2015 IPC, IMC and IFGC Significant Changes

2015 IPC, IMC and IFGC Significant Changes
12/3/2017 2015 IPC, IMC and IFGC Significant Changes Based on the International Plumbing Code® (IPC®), the International Mechanical Code® (IMC®) and the International Fuel Gas Code® (IFGC®) Copyright 2014 International Code Council

Accreditation The International Code Council has been accredited as an Authorized Provider by the International Association for Continuing Education and Training (IACET). As a result of their Authorized Provider accreditation status, ICC is authorized to offer IACET CEUs for its programs that qualify under the ANSI/IACET Standard. You will obtain full CEUs for this course, if you actively participate in the training activities and stay for the entire session. Evidence of this will be the sign out sheet. 2015 IPC, IMC and IFGC Significant Changes

Purpose This program is designed to provide a general overview of notable changes that occurred between the 2012 and 2015 editions of the International Plumbing, Mechanical and Fuel Gas (PMG) Codes. It is intended to acquaint users of the PMG Codes with some of those provisions that have been added, modified or clarified with the previous edition. Only a limited number of changes will be addressed. 2015 IPC, IMC and IFGC Significant Changes

12/3/2017 Description Overviews the changes from the 2012 to the 2015 International Plumbing Code®, 2015 International Mechanical Code® and 2015 International Fuel Gas Code®. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

Objectives Upon completion of this seminar, participants will be better able to: Identify the most significant differences between the 2012 IPC, IMC and IFGC and the 2015 IPC, IMC and IFGC. Explain the differences between the current and previous edition. Identify key changes in organization and code requirements. Identify the applicability of design, plan review and inspection requirements. 2015 IPC, IMC and IFGC Significant Changes

This seminar is based on:
2015 IPC, IMC and IFGC Significant Changes

About the Significant Changes
Underlined Text has been added. “Interior exit stairways and interior exit ramps shall be enclosed with fire barriers constructed in accordance with Section 706.” Lined-out text has been deleted. “Elevator lobbies shall have at least one means of egress complying with Chapter 10 and other provisions within this code.” 2015 IPC, IMC and IFGC Significant Changes

International Plumbing Code, Chapters 1-15
Part 1 International Plumbing Code, Chapters 1-15

202 Alternate Onsite Nonpotable Water Definition
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 202 Alternate Onsite Nonpotable Water Definition CHANGE TYPE: Addition A common problem in potable water saving designs that use nonpotable water in buildings and on building sites is the understanding and naming of the different classes of nonpotable water. The term “reclaimed water” (also known as “recycled water”) has been reserved for nonpotable water that is delivered to the building site by municipal water delivery systems (see “202, Reclaimed Water Definition” in this publication). The term “onsite nonpotable water” is too encompassing, as this means both well water that has not been treated to be potable and gray water from showers and lavatories. The handling and treatment protocols and concerns for these two sources are quite different. Thus, municipally reclaimed water, onsite surface sources and subsurface natural freshwater sources are excluded from this definition. All other onsite nonpotable water is considered alternate onsite nonpotable water. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

202 Backflow Preventer Definition
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 202 Backflow Preventer Definition CHANGE TYPE: Modification This definition has been made more specific about what constitutes a backflow preventer: a backflow prevention assembly, a backflow prevention device or other means or methods. 2015 CODE: Backflow Preventer. A backflow prevention assembly, a backflow prevention device or other means or methods to prevent backflow into the potable water supply. CHANGE SIGNIFICANCE: Changes made in the 2012 IPC throughout many of the potable water backflow prevention sections slightly changed the nomenclature of backflow equipment. There are now three distinct classes of backflow equipment: assemblies, devices and other means or methods. This class distinction clarifies that 1) an assembly is field testable, 2) a device is not testable in the field and 3) a means or method is observable for its adequacy to protect the potable water supply from backflow. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

202 Mechanical Joint Definition
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 202 Mechanical Joint Definition The definition of a mechanical joint now includes heat-fused joints. 2015 CODE: Mechanical Joint. A connection between pipes, fittings, or pipes and fittings that is not screwed, caulked, threaded, soldered, Solvent cemented, brazed, or welded or heat-fused. A joint in which compression is applied along the centerline of the pieces being joined. In some applications, the joint is part of a coupling, fitting, or adapter. CHANGE SIGNIFICANCE: The process of heat fusing is primarily associated with the joining of certain types of plastic piping. The heat fusing process is different from the welding of piping, which generally involves the addition of filler material at the joint. Heat fusing can be performed by the butt method or the socket method. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

202 Toilet Facility Definition
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 202 Toilet Facility Definition CHANGE TYPE: Addition This definition has been added to clarify that a toilet facility is a room or space that contains not less than one water closet and one lavatory. The phrase “toilet facility” is used over 25 times in the code. The common household name for a water closet is “toilet.” Most manufacturers of water closets call the product a “toilet.” Thus, the tendency by many readers of the code is to assume that a toilet facility is a room or space that has a “toilet” (water closet). This misunderstanding can create a problem where the code requires separate (male/female) “toilet” facilities. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

202 Waste Receptor Definition
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 202 Waste Receptor Definition CHANGE TYPE: Addition This definition has been added to clarify what is considered a waste receptor. 2015 CODE: Waste Receptor. A floor sink, standpipe, hub drain or a floor drain that receives the discharge of one or more indirect waste pipes. CHANGE SIGNIFICANCE: The phrase “waste receptor” is used in the code many times. The common assumption has been that a floor sink and a hub drain are waste receptors. Standpipes and floor drains are rarely thought of as being waste receptors, but they are commonly installed for capturing flow from indirect waste pipes. The new definition includes all four items, and referencing waste receptors in the code text makes clear the restrictions for where these waste receptors can and cannot be located. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

12/3/2017 202, Drinking Fountain, Water Cooler and Water Dispenser Definitions; Substitution for Drinking Fountains CHANGE TYPE: Modification These definitions for a drinking fountain, a water dispenser and a water cooler clarify Section 410 on drinking fountain requirements. The water dispenser definition expands the group of devices and apparatus that can be used as substitutions for 50 percent of the required number of drinking fountains. 2015 Code: Drinking Fountain. A plumbing fixture that is connected to the potable water distribution system and the drainage system. The fixture allows the user to obtain a drink directly from a stream of flowing water without the use of any accessories. Water Dispenser. A plumbing fixture that is manually controlled by the user for the purpose of dispensing potable drinking water into a receptacle such as a cup, glass or bottle. Water Cooler. A drinking fountain that incorporates a means of reducing the temperature of the water supplied to it from the potable water distribution system. 410.4 Substitution. Where restaurants provide drinking water in a container free of charge, drinking fountains shall not be required in those restaurants. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

12/3/2017 202 Grease Interceptor, Definition of Fats, Oils and Greases (FOG) Disposal System CHANGE TYPE: Addition Another type of grease interceptor, the Fats, Oils and Greases (FOG) disposal system, has been added to support the revised text in Section covering grease interceptors. 2015 Code: Fats, Oils and Greases (FOG) Disposal System. A plumbing appurtenance that reduces nonpetroleum fats, oils and greases in effluent by separation or mass and volume reduction. The definition describes a new type of grease interceptor that is being used to reduce the discharge of fats, oils and greases (FOG) into public sanitary sewer systems and private sewage disposal systems. Hydromechanical and gravity-type grease interceptors collect fats, oils and greases so that they can be removed from the unit and disposed of according to local regulations. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

Table 308.5 Mid-Story Pipe Guide
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Table Mid-Story Pipe Guide Footnote “b” of Table in previous editions of the code required a mid-story guide for pipe sizes 2 inches and smaller for some types of pipes. Because the code did not define what a midstory guide was, there was uncertainty about what was necessary to be installed. The revised language provides the clarification. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

403.1 Determining Minimum Number of Plumbing Fixtures
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 403.1 Determining Minimum Number of Plumbing Fixtures CHANGE TYPE: Modification The IBC occupancy classifications (A, B, M, etc.) are no longer used to determine which row in Table 403.1, Minimum Number of Required Plumbing Fixtures, to use for fixture quantities. The actual use of the building or space determines which row in the table to use. 403.1 Minimum Number of Fixtures. Plumbing fixtures shall be provided in the minimum number as shown in Table based upon the actual use of the building or space. Uses not shown in Table shall be considered individually by the code official. The number of occupants shall be determined by the International Building Code. In most cases, the IBC occupancy classifications will match the use of the building or space. In other words, the occupancy classifications of the IBC for the purposes of limiting the height and area of a building do not apply for determining the number of plumbing fixtures required for a building. The actual use of the building or space determines the plumbing fixture requirements. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

403.3 Required Public Toilet Facilities Exception
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 403.3 Required Public Toilet Facilities Exception CHANGE TYPE: Modification Occupancies that have limited areas for public access, such as dry cleaners, take-out only restaurants and automated teller machine lobbies, do not require public toilet facilities for those limited areas (300 ft2 or less). 403.3 Required Public Toilet Facilities. Customers, patrons and visitors shall be provided with public toilet facilities in structures and tenant spaces intended for public utilization. The number of plumbing fixtures located within the required toilet facilities shall be provided in accordance with Section 403 for all users. Employees shall be provided with toilet facilities in all occupancies. Employee toilet facilities shall be either separate or combined employee and public toilet facilities. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

403.4.1 Directional Signage for Location of Public Toilet Facilities
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Directional Signage for Location of Public Toilet Facilities CHANGE TYPE: Modification The provision for directional signs to public toilet facilities now requires that the signage be located at the main entrance to the building or tenant space. The intent of this change is to require signage at the entrance of a building or tenant space so that persons entering such spaces are made aware that public toilet facilities do exist and the general direction to those facilities. This also prevents the tenant from telling people that public toilet facilities are not available. The requirement for a sign to be displayed at the entrance to the building or tenant space puts the tenant on notice that public access must be provided to public toilet facilities. Where the required signage is removed by the tenant, this section provides a basis for the code official to require that the tenant replace the sign. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

406.1, 409.2 Backflow Protection for Clothes Washing and Dishwashing Machines
CHANGE TYPE: Modification The 2012 IPC required that an air gap within the appliance or an external backflow preventer in the appliance connections be provided. This modification adds the standards designations with which air gaps must comply, so that the enforcement can be accomplished by the inspector identifying those standard numbers either on the machines or in the literature for the machines. Otherwise, verification would have to be by physical inspection of the machines, which might be impossible to perform. 2015 IPC, IMC and IFGC Significant Changes

413.1 Food Waste Disposer Approval
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 413.1 Food Waste Disposer Approval CHANGE TYPE: Modification Terminology for food waste grinders has been changed to a more industry-accepted term. For electrical safety, domestic food waste disposers must be listed and labeled to a standard. The term “grinder” is not widely accepted in the food waste disposal manufacturing industry. “Grinder” could imply that the appliance merely changes solid food (such as meat) to ground-up meat (such as hamburger meat). However, these appliances are designed to liquefy food so that when the food enters the sanitary drainage system, the discharge flows along the piping in a similar manner as water. Solids do not drop out of the flow to create flow blockage problems. Thus, these appliances effectively “dispose of” the food by turning the food into a liquid flow stream. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

417.4.1 Walls and Floors in Bathtub and Shower Areas
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Walls and Floors in Bathtub and Shower Areas CHANGE TYPE: Modification This section has been modified to make the existing requirements more clear. Wall Area. Bathtub floors, shower floors, the wall areas above built-in tubs that have installed shower heads and walls in shower compartments shall be constructed of smooth, corrosion-resistant and nonabsorbent waterproof materials. Wall materials shall extend to a height of not less than 6 feet (1829 mm) above the room floor level, and not less than 70 inches (1778 mm) above the drain of the tub or shower. Such walls shall form a water-tight joint with each other and with either the tub, receptor or shower floor. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

12/3/2017 420.1 Water Closet Approval CHANGE TYPE: Modification Dual-flush water closets have become popular in recent years. The code now has a standard that covers those types of water closets. Dual-flush water closets offer a flushing mechanism that allows the user to choose between a standard flush volume (equal to or less than the federal and code-mandated maximum flush volume of 1.6 gallons per flush) and a lower flush volume. Lower flush volumes can be used for flushing bowl contents that do not have solids (except for toilet paper), and the standard flush volume is used for flushing bowl contents having solids. Overall, dual-flush water closets can reduce water usage in a building. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

421.1 Whirlpool Tub Approval
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 421.1 Whirlpool Tub Approval CHANGE TYPE: Modification A standard for electrical safety for whirlpool tubs has been added to the code. Any electrical appliance connected to a system that conveys water or liquid waste has the potential to misdirect electrical current to appliance housings and onto other conductive paths that could come in contact with humans. The requirement for listing and Labeling whirlpool tubs to a standard ensures that all necessary precautions have been taken by the manufacturer to protect users of these appliances from hazards. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

423.3 Footbaths, Pedicure Baths and Head Shampoo Sinks
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 423.3 Footbaths, Pedicure Baths and Head Shampoo Sinks CHANGE TYPE: Addition Water-temperature-limiting devices are required for footbaths (integral or not integral to pedicure chairs) and head shampoo sinks. 423.3 Footbaths, Pedicure Baths and Head Shampoo Sinks. The water supplied to specialty plumbing fixtures such as pedicure chairs having an integral foot bath tub, footbaths and head shampoo sinks, shall be limited to a maximum temperature of 120°F (49°C) by a water temperature limiting device that conforms to ASSE 1070 or CSA B125.3. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

424.8 Deck-Mounted Bath/ Shower Transfer Valves
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 424.8 Deck-Mounted Bath/ Shower Transfer Valves CHANGE TYPE: Modification The standard to which deck-mounted bath/ shower transfer valves must comply has changed. The requirements of ASME A are now covered in the harmonized standard ASME A /CSA B125.1. ASME will no longer publish or update the ASME A standard. The harmonized standard has greater coverage for materials and testing of the product. Faucet manufacturers are already familiar with the harmonized standard for their other faucet products. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

501.3 Water Heater Drain Valves
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 501.3 Water Heater Drain Valves CHANGE TYPE: Modification The standard covering water heater drain valves has been discontinued by the standard promulgator. Minimum criteria for drain size and the hose connection have been added to the code for these valves. 501.3 Drain Valves. Drain valves for emptying shall be installed at the bottom of each tank-type water heater and hot water storage tank. The drain valve inlet shall be not less than 3/4 inch nominal iron pipe size and the outlet shall be provided with male garden hose threads. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

504.6 Temperature and Pressure Relief Discharge Piping
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 504.6 Temperature and Pressure Relief Discharge Piping CHANGE TYPE: Modification The temperature and pressure relief valve discharge pipe termination must have an air gap suitable to protect the potable water supply distribution system of the building. Installers often forget that the outlet of a temperature and pressure relief valve is a potable water outlet that must be protected against backflow conditions. The floor where the pipe discharges could become flooded, or the waste receptor could become clogged and over flow. The air gap of twice the pipe diameter provides a minimum level of backflow protection. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

504.7.2 Water Heater Pan Drain Line
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Water Heater Pan Drain Line CHANGE TYPE: Modification In a replacement water heater installation situation, there might not be a nearby drain point for a required pan for the water heater. This code modification allows a pan to not have a drain line if one is not present. Pan Drain Termination. The pan drain shall extend full-size and terminate over a suitably located indirect waste receptor or floor drain or extend to the exterior of the building and terminate not less than 6 inches (152 mm) and not more than 24 inches (610 mm) above the adjacent ground surface. Where a pan drain was not previously installed, a pan drain shall not be required for a replacement water heater installation. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

601.5 Rehabilitation of Piping Systems by Internal Lining
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 601.5 Rehabilitation of Piping Systems by Internal Lining CHANGE TYPE: Addition An epoxy lining system standard has been added to the code. Metallic water-service piping and waterdistribution piping can internally corrode, resulting in leaks. Replacing piping is often a very expensive option because of the process of getting to the piping, the extended labor time to replace the piping in confined areas, the process of repairing finished building materials that were removed and the time that the building or tenant space cannot be used during the replacement. Epoxy internal lining systems can be used to repair leaking piping without removal of the piping. Although some building materials might have to be removed for performing the lining work, the amount is often just a fraction of the materials removed to replace the piping. The material and installation standard covers lining of piping 1/2 inch to 36 inches in diameter by “blown through,” spin cast or handsprayed methods. For potable water service applications, the standard requires that the materials comply with NSF 14 and NSF 61. The standard requires pressure testing of the lined piping. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

605.2.1 Lead Content of Components Conveying Drinking Water
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Lead Content of Components Conveying Drinking Water CHANGE TYPE: Addition The code now has a more stringent limitation for lead content in pipe, pipe fittings, joints, valves, faucets and fixture fittings that convey water used for drinking and cooking. Lead Content of Drinking Water Pipe and Fittings. Pipe, pipe fittings, joints, valves, faucets and fixture fittings utilized to supply water for drinking or cooking purposes shall comply with NSF 372 and shall have a weighted average lead content of 0.25 percent or less. A federal law was enacted to go into effect on January 4, 2014, requiring that pipe, pipe fittings, joints, valves, faucets and fixture fittings that are used to supply water for drinking or cooking purposes have not more than 0.25 percent lead content, based on a weighted average of wetted surface areas. This federal law applies to all areas covered by federal law regardless of whether the 2015 IPC is adopted or not. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

12/3/2017 Tables and 605.4, Section CPVC/AL/CPVC Water Service and Water Distribution Piping A new type of CPVC pipe has been added to Chapter 6. Chlorinated polyvinyl chloride (CPVC) pipe and tubing has been in the code for many editions prior to the 2015 edition. This pipe and tube is a homogenous material all through the pipe wall. CPVC pipe and tubing is supplied in straight lengths with turns (bends) made with fittings. Chlorinated polyvinyl chloride/aluminum/chlorinated polyvinyl chloride (CPVC/AL/CPVC) tubing has a composite wall made up of an inner and an outer CPVC layer with an aluminum core. The core is a longitudinally welded tube of inch-thick aluminum sheet having a tensile strength of not less than 14,600 psi. The CPVC outer and inner layers are adhesive bonded to the aluminum core. The product standard is only for 1/2-, 3/4- and 1-inch copper tube size. Dimensionally, the product has the same inner and outer diameters as CPVC tubing. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

12/3/2017 CPVC/AL/CPVC is installed with the same fittings used for CPVC tubing. The advantage of this product over CPVC tubing is that it is “bendable” either by hand or by standard copper tubing bending tools. The minimum bending radius is six times the pipe outside diameter. The cut ends of the tubing require solvent cementing of a bushing to protect the exposed edge of the aluminum core before fittings are installed. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

Tables 605.3, 702.2, 702.3, 702.4, 1102.4, 1102.5 Asbestos Cement Pipe
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Tables 605.3, 702.2, 702.3, 702.4, , Asbestos Cement Pipe CHANGE TYPE: Modification References to asbestos cement pipe and applicable referenced standards have been removed from the code. Asbestos-cement pipe has not been manufactured in North America for many decades. The potential health issues Associated with asbestos make this piping material unsuitable for use. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

12/3/2017 Table 605.5, Sections , , , , Groove and Shouldered Mechanical Joints and Press-Connect Fittings CHANGE TYPE: Modification Two standards for groove and shouldered mechanical joints and a press-connect fitting standard have been added to the code. Press-connect Joints. Press-connect joints shall conform to one of the standards listed in Table Press-connect joints shall be installed in accordance with the manufacturer’s instructions. Cut tube ends shall be reamed to the full inside diameter of the tube end. Joint surfaces shall be cleaned. The tube shall be fully inserted into the press-connect fitting. Press-connect joints shall be pressed with a tool certified by the manufacturer. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

605.7, Table 605.7 Valve Compliance to Standards
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 605.7, Table Valve Compliance to Standards CHANGE TYPE: Modification All types of valves that supply drinking water must now comply with NSF 61. Standards for numerous types of valves have been added to the code. All valves shall be compatible with the type of piping material installed in the system. Valves intended to supply drinking water shall meet the requirements of NSF 61. Valves shall conform to one of the standards listed in Table or shall be approved. Prior to the 2015 code, only ball valves, gate valves, butterfly valves, globe valves and plug valves that supplied drinking water were required to comply with NSF 61. Missing from this list were pressure-reducing valves, backflow-prevention valves, check valves and solenoid valves (which are typically a globe valve pattern). For the 2015 code, all types of valves that supply drinking water must comply with NSF 61. This increased coverage ensures that contaminants tested for (especially lead) under NSF 61 are not being imparted to the drinking water supply for the building. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

607.2.1 Hot Water Temperature Maintenance System Controls
CHANGE TYPE: Modification Changes in the commercial portion of the International Energy Conservation Code (IECC) caused changes in this IECC-controlled section of the IPC. This section requires temperature maintenance systems (for maintaining hot water temperature near plumbing fixtures) to be automatically turned off when there is not a demand for hot water. The code change also makes it clear that the Section and its subsection do not apply to Group R2, R3 and R4 occupancies that are 3 stories or less in height above grade plane, because those occupancies are covered by the residential portion of the IECC. 2015 IPC, IMC and IFGC Significant Changes

607.2.1 Hot Water Temperature Maintenance System Controls
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Hot Water Temperature Maintenance System Controls Hot Water Temperature Maintenance System Controls. For hot water distribution system circulating hot water system pumps and heat trace, the pumps and heat trace shall be arranged to be turned off automatically when there is not hot water demand. Ready access shall be provided to the operating controls. This section and Section shall not apply to hot water temperature maintenance system controls in Group R2, R3 and R4 occupancies that are 3 stories or less in height above grade plane. Hot water temperature are 3 stories or less in height above grade plane shall be in accordance with Section R of the International Energy Conservation Code. Storage Tank Hot Water Circulation Systems. Circulating pumps intended to maintain storage tank water temperature shall have controls that will limit operation of the pump from heating cycle start up to not greater than 5 minutes after the end of the cycle. Ready access shall be provided to the operating controls. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

607.3 Hot Water Thermal Expansion Pressure Control
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 607.3 Hot Water Thermal Expansion Pressure Control CHANGE TYPE: Modification The available method to control closed-system pressure increases caused by the heating of water has been limited to the use of thermal expansion tanks only. 607.3 Thermal Expansion Control Where a storage water heater is supplied with cold water that passes through a check valve, pressure reducing valve or backflow preventer, a thermal expansion tank shall be connected to the water heater cold water supply pipe at a point that is downstream of all check valves, pressure reducing valves and backflow preventers. Thermal expansion tanks shall be sized in accordance with the tank manufacturer’s instructions and shall be sized such that the pressure in the water distribution system shall not exceed that required by Section 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

608.8, 608.8.1, 608.8.2 Identification of Nonpotable Water
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 608.8, , Identification of Nonpotable Water CHANGE TYPE: Modification Fixtures such as water closets and urinals that utilize nonpotable water must be identified with words and a symbol indicating that nonpotable water is being used. The color purple is established for identifying distribution piping conveying nonpotable water. Water conservation practices are creating the need to use an increasing number of alternate sources of water instead of potable water for a variety of purposes. This creates a need for identification of water piping carrying the alternate water so that inappropriate connections to such piping systems are not made. The 2012 IPC did require reclaimed, rain and gray water piping to be identified with the color purple. However, because there are many other alternate sources of water that must be labeled in the same manner, the code has been changed to include all types of nonpotable water for the required marking. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

702.5 Temperature Rating of Drainage Piping
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 702.5 Temperature Rating of Drainage Piping CHANGE TYPE: Addition Wastewater having a temperature greater than 140°F (60°C) does not need to be cooled before it enters the drainage system if the drainage system piping is rated for the higher temperature. The drainage piping materials indicated in Tables through are all capable of continuously conveying 140°F (60°C) wastewater. Section of 2012 required that higher temperature waste water be cooled before it was allowed to enter the drainage system. However, some piping materials are capable of the higher temperature flows. Therefore, if piping with a higher temperature rating is used, there is no need for cooling wastewater before it is discharged to the system. Section has been deleted to allow Section to be added to the code. Some common applications where waste water of temperatures greater than 140°F (60°C) are discharged to drainage systems are dishwashers Using 180°F (82°C) rinse water and kitchen cooking-kettle waste water. Designing cooling systems for these discharges can be complicated and wasteful of potable water. If the drainage system piping is properly chosen for the high temperatures that will be encountered, the need for cooling is eliminated. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

703.6 Connection to Combined Sanitary and Storm Public Sewer
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 703.6 Connection to Combined Sanitary and Storm Public Sewer CHANGE TYPE: Addition Building sanitary sewers and building storm sewers must be independent even though connecting to a combined sanitary/storm public sewer. Even though a public sewer system is a combined sanitary and storm sewer, the connections to such a public sewer from a building must be made independently. Some older cities having combined sanitary/storm sewers are working on installing separate storm sewer systems to reduce or eventually eliminate storm water discharge to the public sanitary sewer system. Buildings that already have separate sewer lines will be easier to convert to the separated public sewer systems. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

12/3/2017 Exception for Solvent Cementing PVC Piping 4 Inches and Smaller CHANGE TYPE: Modification The application of a primer to drain, waste and vent PVC pipe and fittings prior to solvent cementing is not required for 4-inch pipe size and smaller. Solvent Cementing. Joint surfaces shall be clean and free from moisture. A purple primer that conforms to ASTM F 656 shall be applied. Solvent cement not purple in color and conforming to ASTM D 2564, CSA B137.3, CSA B181.2 or CSA B182.1 shall be applied to all joint surfaces. The joint shall be made while the cement is wet and shall be in accordance with ASTM D Solvent-cement joints shall be permitted above or below ground. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

708 Cleanouts for Drainage and Waste Systems
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 708 Cleanouts for Drainage and Waste Systems CHANGE TYPE: Modification The section on cleanouts has been completely reorganized and reworded for clarity. Brass cleanout plugs are permitted for metallic piping only. Where located at a finished wall, the cleanout must be within 1½ inches of the finished surface. A cleanout is no longer required at the base of each waste or soil stack. The reorganization of the section presents the material in a logical format that better clarifies the requirements for cleanouts. Section 106.2, item 2, allows the removal and reinstallation of water closets without the need for a permit. As such, a common practice has been to allow the removal of a water closet to serve as a cleanout access point for rodding horizontal drain piping. The rewrite of this section does not change this allowance except for one location–where the removal of a water closet is necessary for rodding the building drain-to-building sewer junction. The type of rodding equipment that is sometimes necessary to clear a stoppage (typically root intrusion) in the building sewer should not need to be brought indoors, let alone squeezed into the sometimes congested finished area of a toilet room. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

715.1 Exception for Backwater Valve Installations
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 715.1 Exception for Backwater Valve Installations CHANGE TYPE: Modification Retrofit of a backwater valve in accordance with the code in an existing building is nearly impossible without the new exception. Change Summary: Retrofit of a backwater valve in accordance with the code in an existing building is nearly impossible without the new exception. 715.1 Sewage Backflow. Where plumbing fixtures are installed on a floor with a finished floor elevation below the elevation of the manhole cover of the next upstream manhole in the public sewer, such fixtures shall be protected by a backwater valve installed in the building drain, or horizontal branch serving such fixtures. Plumbing fixtures installed on a floor with a finished floor elevation above the elevation of the manhole cover of the next upstream manhole in the public sewer shall not discharge through a backwater valve. Exception: In existing buildings, fixtures above the elevation of the manhole cover of the next upstream manhole in the public sewer shall not be prohibited from discharging through a backwater valve. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

716 Vacuum Drainage Systems
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 716 Vacuum Drainage Systems CHANGE TYPE: Addition Vacuum drainage system provisions (as opposed to gravity drainage system provisions) have been moved from the appendix to the code. 716.2 System Design. Vacuum drainage systems shall be designed in accordance with the vacuum drainage system manufacturer’s instructions. The system layout, including piping layout, tank assemblies, vacuum pump assembly and other components necessary for proper function of the system, shall be in accordance with the manufacturer’s instructions. Plans, specifications and other data for such systems shall be submitted to the code official for review and approval prior to installation. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

717 Replacement of Sewers by Pipe-Bursting Method
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 717 Replacement of Sewers by Pipe-Bursting Method CHANGE TYPE: Addition Replacement of building sewers by the pipe-bursting method has been used for many decades and is useful especially where excavation of the existing sewer is difficult and costly because of parking lots and other items on the ground surface that would need to be removed and replaced. Although the pipe-bursting method of underground pipe replacement is used for large pipe sizes, the code limits its use to the replacement of pipes that are 6 inches and smaller. The method uses an expanding mandrel that is attached to the end of the replacement pipe. The mandrel (with the replacement pipe in tow) is pulled by a cable through the existing sewer line. The mandrel has a hydraulically activated expanding shell that expands and breaks (bursts) the existing pipe to make room for the new pipe as it is pulled into position. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

802.1, 802.1.1, 802.1.8 Food-Handling Equipment Indirect Connection
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 802.1, , Food-Handling Equipment Indirect Connection CHANGE TYPE: Modification The section has been clarified to indicate that Section and its subsections do not apply to fixtures and equipment in dwelling units. The section was modified to indicate the types of food-handling equipment that Sections through cover. 802.1 Where Required. Food-handling equipment, in other than dwelling units, clearwater waste, dishwashing machines and utensil, pots, pans and dish washing sinks shall discharge through an indirect waste pipe as specified in Sections through Healthcare related fixtures, devices and equipment shall discharge to the drainage system through an indirect waste pipe by means of an air gap in accordance with this chapter and Section Fixtures not required by this section to be indirectly connected shall be directly connected to the plumbing system in accordance with Chapter 7. Food Handling. Equipment and fixtures utilized for the storage, preparation and handling of food shall discharge through an indirect waste pipe by means of an air gap. Each well of a multi-compartment sink shall discharge independently to a waste receptor. Food Utensils, Dishes, Pots and Pans Sinks. Sinks, in other than dwelling units, used for the washing, rinsing or sanitizing of utensils, dishes, pots, pans or service ware used in the preparation, serving or eating of food shall discharge indirectly through an air gap or an air break to the drainage system. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

802.3 Waste Receptors, Hub Drains and Standpipes
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 802.3 Waste Receptors, Hub Drains and Standpipes CHANGE TYPE: Modification The code has clarified that standpipes are waste receptors. Some limitations for where waste receptors could not be located have been removed. Hub drains now require a strainer. A definition for waste receptor has been added to Chapter 2 (see “202, Waste Receptor” in this publication). Waste receptors do not need approval by the code official because the new definition is specific about what constitutes a waste receptor. Floor sinks and floor drains are required to comply with standards. Standpipes and hub drains have code requirements. Any other receptor that the designer or installer wants to use will have to be approved under Section 105.2, “Alternate Materials, Methods and Equipment.” Hub drains that receive only clear water waste and standpipes do not require strainers on the outlet of these receptors. There is a low probability that solids will enter these receptors, and strainers are not needed. However, for all other receptors, a strainer on the outlet is required, including for hub drains. This is a new requirement. A hub drain strainer could be simply a piece of corrosion-resistant hardware cloth with 1/4-inch (6.4 mm) by 1/4-inch openings fitted into the hub of the hubbed end of cast iron pipe or a reducer fitting for other types of pipe. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

903.1, 903.2 Vent Terminations to Outdoors
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 903.1, Vent Terminations to Outdoors CHANGE TYPE: Modification This change clarifies vent terminations to outdoors where roofs are used for purposes other than weather protection and where very cold weather conditions occur. 903.1 Roof Extension. Open vent pipes that extend through a roof shall be terminated not less than [NUMBER] inches (mm) above the roof. Where a roof is to be used for assembly or as a promenade, observation deck, sunbathing deck or similar purposes open vent pipes shall terminate not less than 7 feet (2134 mm) above the roof. 903.2 Frost Closure. Where the 97.5-percent value for outside design temperature is 0°F (218°C) or less, vent extensions through a roof or wall shall be not less than 3 inches (76 mm) in diameter. Any increase in the size of the vent shall be made not less than 1 foot inside the building’s thermal envelope 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

1002.1 Exception for Traps for Parking Garage Floor Drains
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Exception for Traps for Parking Garage Floor Drains CHANGE TYPE: Modification Traps are not required for parking garage floor drains where the drains are connected to a storm sewer system. CHANGE SUMMARY: Traps are not required for parking garage floor drains where the drains are connected to a storm sewer system. 2015 Code: Fixture traps. Each plumbing fixture shall be separately trapped by a liquid-seal trap, except as otherwise permitted by this code. The vertical distance from the fixture outlet to the trap weir shall not exceed 24 inches (610 mm), and the horizontal distance shall not exceed 30 inches (610 mm) measured from the centerline of the fixture outlet to the centerline of the inlet of the trap. The height of a clothes washer standpipe above a trap shall conform to Section A fixture shall not be double trapped. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

1002.4, 1002.4.1 Trap Seal Protection against Evaporation
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 1002.4, Trap Seal Protection against Evaporation CHANGE TYPE: Modification Trap seal protection against evaporation can now be accomplished in a variety of ways. Section has been expanded to cover two additional types of trap seal protection devices and to distinguish between the different types of water-supplied trap seal protection devices. Potable-water-supplied trap seal devices have been an industry standard for decades. However, with greater reliance on alternate sources of nonpotable water such as reclaimed water and gray water, the quality of those types of water has a bearing on the performance of water-supplied trap devices. The manufacturer of those devices must be consulted where alternate sources of water are supplied to the devices. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

1003.3.6 Gravity Grease Interceptors
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Gravity Grease Interceptors CHANGE TYPE: Addition A section and standard covering gravity grease interceptors have been added to the code. Until now, the IPC has not addressed or regulated gravity-type grease interceptors, primarily because there was a lack of standards regulating the construction of these tanks, which are most often installed underground. Gravity grease interceptors work by reducing the waste-water flow velocity so that the grease floats and solids settle to the bottom of the tank. Waste water between these two layers is allowed to pass into the sewer system. Gravity grease interceptors can be fitted with Fats, Oils and Greases (FOG) disposal systems so that such material can be reduced into water form, thus extending the required cleaning intervals of the tank. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

1003.3.7 Direct Connection of Grease Interceptor Discharge
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Direct Connection of Grease Interceptor Discharge CHANGE TYPE: Addition Grease interceptor discharge piping must connect directly to the sanitary drainage system. Grease interceptor discharge piping must connect directly to the sanitary drainage system. In new construction, designing plumbing systems to accommodate grease interceptors rarely presents any problem with direct connection of the discharge to the sanitary drain system. In existing buildings, direct connection is difficult because drain piping is often not located in a convenient location or is buried below concrete slabs. Sometimes what is thought to be an appropriate solution is to discharge the grease interceptor by indirect connection to a floor sink or other waste receptor. Even though this defies logic, the code did not prohibit this practice. For the 2015 IPC, grease interceptors must be directly connected to the sanitary drainage system. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

1003.4 Oil Separator Required
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Oil Separator Required CHANGE TYPE: Modification Section has been clarified to indicate where oil separators are required. An addition to the exception concerning alarm systems has been made. CHANGE SUMMARY: Section has been clarified to indicate where oil separators are required. An addition to the exception concerning alarm systems has been made. Oil Separators Required. At repair garages where floor or trench drains are provided, car washing facilities, factories where oily and flammable liquid wastes are produced and hydraulic elevator pits, oil separators shall be installed into which oil-bearing, grease-bearing or flammable wastes shall be discharged before emptying into the building drainage system or other point of disposal. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

1003.6 Clothes Washer Discharge Interceptor
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Clothes Washer Discharge Interceptor CHANGE TYPE: Modification The requirement for interceptors for clothes washer discharges has been clarified. The requirement for interceptors for clothes washer discharges has been clarified. Clothes washers shall discharge through an interceptor that is provided with a wire basket or similar device, Removable for cleaning, that prevents passage into the drainage system of solids 1/2 inch (12.7 mm) or larger in size, string, rags, buttons or other materials detrimental to the public sewage system. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

1003.9 Venting of Interceptors and Separators
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Venting of Interceptors and Separators CHANGE TYPE: Modification Interceptors and separators must be vented. Interceptors and separators shall be designed so as not to become air bound. It is difficult to determine whether the contents of an interceptor or separator could be siphoned out by conditions in the piping downstream of these devices. The best precaution against siphoning is for a vent to be installed on the unit in accordance with the manufacturer’s instructions, or, where the manufacturer does not provide a vent connection, on the discharge piping of the separator or interceptor. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

1105.2, 1106.2 Sizing of Roof Drains, Vertical and Horizontal Storm Drain Piping
CHANGE TYPE: Modification Testing of many different sizes and configurations of roof drains from a variety of manufacturers indicated that the roof drain assembly is the limiting factor in the design of storm drain systems. Storm drainage piping must now be sized based on the published roof drain flow rate and anticipated ponding at the roof drain. 2015 IPC, IMC and IFGC Significant Changes

1106.3, 1106.6 Sizing of Gutters and Leaders
CHANGE TYPE: Modification The 2012 Table (2), which covered the vertical leader sizing requirements, has been replaced by the simplified Table The 2012 Table , which covered horizontal gutter sizing requirements, has been replaced by the simplified Table These sizing methods correspond with American Society of Plumbing Engineers’ (ASPE) sizing tables. 2015 IPC, IMC and IFGC Significant Changes

Discussion Activity Of all the changes to the plumbing code, covered thus far, which would be most important for you in your jurisdiction. 2015 IPC, IMC and IFGC Significant Changes

International Mechanical Code, Chapters 1-15
Part 2 International Mechanical Code, Chapters 1-15

304.11 Fall-Arresting Restraint Systems
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Fall-Arresting Restraint Systems Change Type: Modification The exception allows for fall-arresting restraint systems to be employed instead of guards on roofs. The exception allows for fall-arresting restraint systems to be employed instead of guards on roofs. Guards are not required on roofs where anchorage-connector devices are installed at specified intervals and locations that allow service personnel to use safety harnesses and lines as part of a fall-arresting system. The new exception is aimed at sloped roofs where such safety systems are typically utilized. Restraint systems have limited application for flat roofs, where mechanical appliances and Equipment are typically located, because of the impracticality of workers navigating around rooftop heating, ventilation and air conditioning (HVAC) units while tethered to anchorage points. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

12/3/2017 306.1 Access CHANGE TYPE: Modification More than just appliances are now required to have access for inspection, service, replacement and repair. Sometimes HVAC controls, heat exchanger units and similar devices are installed behind, under or above permanent construction or installed where other appliances or equipment obstructs access. This new section expands the access requirements beyond appliances. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

307.2.5 Condensate Drain Line Maintenance
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Condensate Drain Line Maintenance CHANGE TYPE: Addition The code requires that condensate drains be configured or equipped to allow maintenance of the drain without the drain pipe or tubing being cut. Drains that convey condensate water from cooling coils and evaporators are known to develop blockages as a result of debris and biological growth in the system. These drains are commonly cleared of blockages by a compressed gas such as air or nitrogen being forced through the drain. It is inherently hazardous to pressurize plastic piping such as PVC and CPVC with a compressed gas because of the potential for violent rupture and propelled shards of plastic. The drains are seldom large enough to accommodate mechanical drain cleaning (rodding) equipment. The code permits any arrangement that provides access to the drain interior without the drain being severed or cut. This includes capped or plugged tees and cross fittings, unions, removable mechanical couplings and specialty devices made specifically for the attachment of compressed-gas hoses. The intent is to prevent the spillage of condensate that would cause damage to the structure. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

307.3 Condensate Pumps in Uninhabitable Spaces
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 307.3 Condensate Pumps in Uninhabitable Spaces CHANGE TYPE: Addition Condensate pumps located in uninhabitable spaces and used with condensing fuel-fired appliances and cooling equipment must be connected to the appliance or equipment served by the pump to prevent water damage in the event of pump failure. 307.3 Condensate Pumps. Condensate pumps located in uninhabitable spaces, such as attics and crawl spaces, shall be connected to the appliance or equipment served such that when the pump fails, the appliance or equipment will be prevented from operating. Pumps shall be installed in accordance with the manufacturer’s instructions. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

401.2, 407.1, Table 403.3.1.1 Ventilation Required
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 401.2, 407.1, Table Ventilation Required CHANGE TYPE: Modification Occupancies including hospitals, nursing homes, detoxification facilities and ambulatory care facilities must be ventilated in accordance with a new standard, ASHRAE 170. 401.2 Ventilation Required. Every occupied space shall be ventilated by natural means in accordance with Section 402 or by mechanical means in accordance with Section 403. Where the air infiltration rate in a dwelling unit is less than 5 air changes per hour when tested with a blower door at a pressure of 0.2-inch water column (50 Pa) in accordance with Section R of the International Energy Conservation Code, the dwelling unit shall be ventilated by mechanical means in accordance with Section 403. Ambulatory care facilities and Group I-2 occupancies shall be ventilated by mechanical means in accordance with Section 407. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

403.2.1, Table 403.3.1.1 Recirculation of Air
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 , Table Recirculation of Air CHANGE TYPE: Clarification The revisions to Section and notes b and g of Table clarify that recirculation of air within a space is permitted. Recirculation of Air. The outdoor air required by Section shall not be recirculated. Air in excess of that required by Section shall not be prohibited from being recirculated as a component of supply air to building spaces, except that: 1. Ventilation air shall not be recirculated from one dwelling to another or to dissimilar occupancies. 2. Supply air to a swimming pool and associated deck areas shall not be recirculated unless such air is dehumidified to maintain the relative humidity of the area at 60 percent or less. Air from this area shall not be recirculated to other spaces where more than 10 percent of the resulting supply airstream consists of air recirculated from these spaces. 3. Where mechanical exhaust is required by note b in Table , recirculation of air from such spaces shall be prohibited. Recirculation of air that is contained completely within such spaces shall not be prohibited. Where recirculation of air is prohibited, all air supplied to such spaces shall be exhausted, including any air in excess of that required by Table 4. Where mechanical exhaust is required by note g in Table , mechanical exhaust is required and recirculation from such spaces is prohibited where more than 10 percent of the resulting supply airstream consists of air recirculated from these spaces. Recirculation of air that is contained completely within such spaces shall not be prohibited. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

403.3 Outdoor Air and Local Exhaust Airflow Rates
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 403.3 Outdoor Air and Local Exhaust Airflow Rates CHANGE TYPE: Addition The new text introduces the basic requirements of ASHRAE 62.2 related to mechanical ventilation for Group R-2, R-3 and R-4 buildings three stories or less in height. The new text simplifies the mechanical ventilation compliance path for Group R-2, R-3 and R-4 buildings three stories or less in height above grade plane to be consistent with those in the 2012 IRC and ASHRAE These buildings more closely match the scope of ASHRAE 62.2 than ASHRAE 62.1, and they should not be subject to the rigor of the design calculations of ASHRAE 62.1/IMC Section 403. Section 403 of the IMC is based on ASHRAE One advantage gained by aligning the mechanical ventilation path for these buildings with ASHRAE 62.2 and the 2012 IRC Section M1507 is that only one equation is necessary instead of the multiple equations that a designer could have to solve if following the prescriptive requirements of Section 403. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

Table 403.3.1.1 Manicure and Pedicure Station Exhaust Rate
CHANGE TYPE: Modification The revised note h to Table recognizes new Section for the design of manicure and pedicure station exhaust systems and also specifies the applicability to both. Note h addresses the relationship between the source capture system exhaust-flow rate and the exhaust-flow rate specified within the table for nail salons. 2015 IPC, IMC and IFGC Significant Changes

404.1 Intermittent Operation of Mechanical Ventilation Systems for Enclosed Parking Garages
CHANGE TYPE: Modification For enclosed parking garages, the ventilation system must operate continuously or must be automatically controlled for intermittent operation utilizing both carbon monoxide and nitrogen dioxide detectors. The option to detect vehicle operation or occupant presence has been deleted. 2015 IPC, IMC and IFGC Significant Changes

501.3 Mechanical Exhaust System Discharge
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 501.3 Mechanical Exhaust System Discharge CHANGE TYPE: Modification The adjective “public” was added to “nuisance” to make this requirement more enforceable. The new exception correlates with Section 505.1, exception 1. 501.3 Exhaust Discharge. The air removed by every mechanical exhaust system shall be discharged outdoors at a point where it will not cause a public nuisance and not less than the distances specified in Section The air shall be discharged to a location from which it cannot again be readily drawn in by a ventilating system. Air shall not be exhausted into an attic, crawl space, or be directed onto walkways. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

502.20 Manicure and Pedicure Station Exhaust System
CHANGE TYPE: Addition New text specifically covers manicure and pedicure stations and states exhaust requirements in addition to those in Table In previous editions of the code, pedicure stations were not specifically called out, as the text in Table referred only to nail salons generically. 2015 IPC, IMC and IFGC Significant Changes

504.5, 504.8.4.3 Dryer Exhaust Duct Power Ventilators
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 504.5, Dryer Exhaust Duct Power Ventilators CHANGE TYPE: Addition New text recognizes the use of dryer exhaust duct power ventilators (DEDPVs) for installations that exceed the allowable exhaust duct length for clothes dryers. 504.5 Dryer Exhaust Duct Power Ventilators. Domestic dryer exhaust duct power ventilators shall be listed and labeled to UL 705 for use in dryer exhaust duct systems. The dryer exhaust duct power ventilator shall be installed in accordance with the manufacturer’s instructions. Dryer Exhaust Duct Power Ventilator Length. The maximum length of the exhaust duct shall be determined by the dryer exhaust duct power ventilator manufacturer’s installation instructions. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

504.8.2 Dryer Exhaust Duct Installation
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Dryer Exhaust Duct Installation CHANGE TYPE: Modification Instead of prohibiting all duct fasteners such as screws and rivets, the code now limits the penetration of fasteners where installed. Duct Installation. Exhaust ducts shall be supported at 4-foot (1219 mm) intervals and secured in place. The insert end of the duct shall extend into the adjoining duct or fitting in the direction of airflow. Ducts shall not be joined with screws or similar fasteners that protrude more than 1/8 inch (3.2 mm) into the inside of the duct. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

12/3/2017 505.1, Domestic Range Hoods CHANGE TYPE: Modification The scope of domestic kitchen hoods coverage has been expanded to beyond dwellings units. Domestic hoods are mandated in new Section 505.1 Domestic Systems. Where domestic range hoods and domestic appliances equipped with downdraft exhaust provided, such hoods and appliances shall discharge to the outdoors through sheet metal ducts constructed of galvanized steel, stainless steel, aluminum or copper. Such ducts shall have smooth inner walls, shall be air tight, shall be equipped with a backdraft damper, and shall be independent of all other exhaust systems. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

505.3 Domestic Kitchen Exhaust Systems in Multistory Buildings
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 505.3 Domestic Kitchen Exhaust Systems in Multistory Buildings CHANGE TYPE: Addition New text regulates the design and construction of exhaust shafts that serve domestic kitchen exhaust systems in multistory buildings. The code allows a similar design for domestic clothes dryer exhaust, but previous editions were silent on domestic kitchen exhaust. Designers typically want to design exhaust shafts for multistory and high-rise residential buildings because it is difficult to exhaust each dwelling through exterior walls. There are many design considerations for these shafts, most of which are addressed in the new text. Additional design considerations that are not addressed include the continuous exhaust (24/7) that will occur in each dwelling, the capability of cleaning the ducts in the shaft if needed and the balancing of airflow to account for each dwelling’s proximity to the exhaust fan. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

506.3.7.1 Grease Duct Reservoirs
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Grease Duct Reservoirs CHANGE TYPE: Modification A grease duct reservoir must now be the full width of the duct in all cases, and the reservoir must be provided with a drain opening. A grease duct reservoir must now be the full width of the duct in all cases, and the reservoir must be provided with a drain opening. The text in item 3 in the 2012 edition would allow, for example, a reservoir to be 12 inches by 12 inches if the duct was 24 inches wide. Also, if the duct was less than 12 inches wide, for example 10 inches, the reservoir could be 2 inches less in width (8 inches). In such cases, the grease could flow around the edges of the reservoir, thus bypassing it entirely. The new text requires that the reservoir be as wide as the duct, so that no avenue exists for grease to flow around the reservoir instead of into the reservoir. Item 5 has been changed from requiring only that the reservoir bottom slopes to requiring that the bottom slope to a drain. This implies that a drain opening must be provided to allow removal of captured liquids. This might be accomplished with a threaded fitting welded in place with a cap or plug. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

506.3.8 Grease Duct Cleanouts and Openings
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Grease Duct Cleanouts and Openings CHANGE TYPE: Modification The cleanout spacing provisions have been added to be consistent with Section for horizontal ducts. The new grease duct cleanout spacing provisions apply to vertical duct sections that are not accessible from the hood or terminal end. Vertical sections of grease duct might occur between offsets in vertical duct runs or in offsets in horizontal duct runs. Such sections could be considered to be inaccessible for inspection, cleaning and maintenance. Depending upon the capabilities of the duct-cleaning equipment and visual observation equipment, this code section can be interpreted as requiring cleanouts for sections of ducts that extend beyond changes in direction in the duct run. Duct sections that extend beyond changes in direction could be viewed as inaccessible because they are out of the line of sight from the hood connection or from the duct terminal outdoors. The success or failure of duct-cleaning operations would be hard to determine without cleanouts or high-tech duct camera equipment. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

506.3.11 Grease Duct Enclosures
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Grease Duct Enclosures CHANGE TYPE: Modification The code specifically prohibits the installation of fire and smoke dampers in grease ducts. It has long been understood that fire and smoke dampers are not compatible with grease ducts, and the duct enclosure requirements clearly account for the lack of such dampers where the ducts penetrate walls, floors and ceilings. Fire and smoke dampers would be made useless by the severe environment within grease ducts (e.g. high temperatures, grease, cleaning chemicals and water). The code now prohibits what has been assumed to be prohibited all along. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

12/3/2017 In-Line Fan Location in Exhaust Ducts Serving Commercial Kitchen Hoods CHANGE TYPE: Addition New text addresses the enclosure requirements for in-line exhaust fans located in kitchen hood exhaust ducts, in effect treating them the same as ducts. In-Line Fan Location. Where enclosed duct systems are connected to in-line fans not located outdoors, the fan shall be located in a room or space having the same fire resistance rating as the duct enclosure. Access shall be provided for servicing and cleaning of fan components. Such rooms or spaces shall be ventilated in accordance with the fan manufacturers’ installation instructions. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

506.5.3 Hinged Up-Blast Fans for Type I Hoods
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Hinged Up-Blast Fans for Type I Hoods CHANGE TYPE: Modification The code now requires that hinged exhaust fans be provided with a means to limit the travel of the fan assembly to prevent injury to personnel and damage to the building and fan. Up-blast fans are required to be hinged so that they can be tilted from their mounting base for purposes of cleaning, maintenance and repairs. Such fans are heavy, and when they are tilted, they can easily escape the control of personnel and fall, causing injury to the workers and/or damage to the roof, wiring and the fan itself. This requirement applies regardless of the mounting angle of the fan. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

507.1 Type I Hood Installation
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 507.1 Type I Hood Installation CHANGE TYPE: Modification A requirement has been added for Type I hood installations to comply with all aspects of a Type I exhaust system, whether the Type I hood is required by the code or installed by choice. Sometimes Type I hoods are installed where they are not required by code. It could be by error or because the hood is being repurposed in a new location. If such a Type I hood was connected to ductwork suitable only for Type II hood systems, a fire hazard could result. Building owners and tenants could think that they have a Type I hood system when viewing the hood, not realizing that the hood system is actually a mismatch of a Type I hood with ductwork that is not compatible with a Type I hood. The ductwork would likely lack the required clearance to combustibles, the proper metal thickness, cleanouts and fire suppression. If the Type I hood was later used with appliances requiring Type I hoods, a severe fire hazard would result, unknown to the building owner or tenants. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

507.1.1 Commercial Kitchen Exhaust Hood System Operation
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Commercial Kitchen Exhaust Hood System Operation CHANGE TYPE: Modification The requirement for automatic activation of the exhaust system has been revised to provide the intended performance requirements and to clarify that an interlock arrangement is an alternative to automatic hood operation. The new text provides the criterion for how soon the hood system must activate after the first appliance has been turned on. The code was silent on this previously. If an automatically activated (smart hood) system is used, such a system must begin operation within 15 minutes of the first cooking appliance(s) being turned on. To have the hood system activate so quickly will require sensitive and sophisticated controls. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

507.1.1.1 Heat Sensors for Multiple Commercial Kitchen Hoods
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Heat Sensors for Multiple Commercial Kitchen Hoods CHANGE TYPE: Addition New text prohibits the use of a single sensor mounted in the common ductwork for commercial kitchen hood systems having multiple hoods manifolded together. If a single heat sensor is depended upon for the activation of the exhaust system when cooking occurs, and more than one hood is connected to a common duct system, the location of the heat sensor could cause unacceptable delay. If the sensor were in the common duct, it would be a considerable distance from each hood served by the common system. This new text requires individual sensors for each hood in order to increase the reliability and decrease the operation response time of the activation system. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

507.2.8 Type I Hood Grease Filters
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Type I Hood Grease Filters CHANGE TYPE: Modification The code now recognizes the use of disposable grease filters. Filters shall be of such size, type and arrangement as will permit the required quantity of air to pass through such units at rates not exceeding those for which the filter or unit was designed or approved. Filter units shall be installed in frames or holders so as to be readily removable without the use of separate tools, unless designed and installed to be cleaned in place and the system is equipped for such cleaning in place. Where filters are designed to be and required to be cleaned, removable filter units shall be of a size that will allow them to be cleaned in a dishwashing machine or pot sink. Filter units shall be arranged in place or provided with drip-intercepting devices to prevent grease or other condensate from dripping into food or on food preparation surfaces. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

508.1.2 Air Balance for Commercial Kitchen Ventilation Systems
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Air Balance for Commercial Kitchen Ventilation Systems CHANGE TYPE: Addition This new section requires that an air balance schedule be submitted with the design plans for commercial kitchen ventilation systems. Kitchen exhaust systems are commonly compromised by imbalances that starve the system for replacement air. Replacement air is defined as air that replaces what an exhaust system removes from a space, and replacement air can be outdoor makeup air, infiltration air or transfer air from other spaces. Exfiltration is the uncontrolled transfer of indoor air to the outdoors through leakage paths in the building envelope; it is caused by pressure differentials resulting from wind, stack effect and building pressurization. The required air balance schedule must account for all exhaust and replacement air so that the kitchen exhaust system will function as intended. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

510.4, 510.5 Hazardous Exhaust Systems
CHANGE TYPE: Modification Text in previous editions of the code that alluded to the recirculation of hazardous exhaust has been deleted. The previous exception was too broad in application, so the entire section has been formatted to clarify the scope of the exception. Previous item 7 has been revised to prescribe the method for maintaining continuous negative pressure. 2015 IPC, IMC and IFGC Significant Changes

510.7.1.1 Hazardous Exhaust Duct Penetrations of Shafts
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Hazardous Exhaust Duct Penetrations of Shafts CHANGE TYPE: Addition A pointer to the International Building Code (IBC) provisions for hazardous exhaust duct penetrations of shafts has been added. The code prohibits fire and smoke dampers in hazardous exhaust ducts; therefore, another means of protection is required for penetrations of fire-resistance-rated assemblies. Section requires protection of shaft wall penetrations and provides no exception for hazardous exhaust ducts. Previous editions of the code addressed penetrations of fire walls, floor/ceiling assemblies and wall assemblies but did not address shaft penetrations. The new reference to the IBC will require protection in the form of through-penetration firestop systems or shaft wall assemblies that were tested with the penetrations. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

514.2 Energy Recovery Ventilation Systems
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 514.2 Energy Recovery Ventilation Systems CHANGE TYPE: Modification Energy recovery ventilation (ERV) systems of the coil-type heat exchanger (run-around coils) are no longer limited in their application. The demands to save energy along with “green” construction codes and building sustainability rating systems have made ERV systems more and more desirable. ERVs are being utilized for laboratory and commercial kitchen exhaust systems to extract heat that would otherwise be lost to the outdoors. Someday, the majority of exhaust systems will employ some type of sensible heat recovery, and in many cases latent heat recovery is feasible. The new exception speaks to a type of ERV heat exchanger that does not use rotating elements or fixed plate surfaces; therefore, the risk of cross-contamination between the exhaust and intake air streams is eliminated. Coil-type heat exchangers use pipe or tubing containing a liquid or a refrigerant as a heat-exchange medium. The potential for contaminant leakage and carryover from the exhaust stream is nonexistent for coil-type ERVs. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

12/3/2017 601.5 Return Air Openings CHANGE TYPE: Addition The often misunderstood provisions in previous editions of the code for return air have been relocated from a section specific to forced-air/warm-air furnaces in Chapter 9 to a more generic section in Chapter 6. The provisions have been clarified and streamlined to capture the desired intent. The often misunderstood provisions in previous editions of the code for return air have been relocated from a section specific to forced-air/warm-air furnaces in Chapter 9 to a more generic section in Chapter 6. The provisions have been clarified and streamlined to capture the desired intent. The provisions in Section of the 2012 code, especially items 4 and 7, were difficult to interpret, but were intending to prevent the condition where a furnace blower would produce a negative pressure that would, in turn, cause fuel-fired appliances to backdraft and spill combustion products into the space. The goal was to achieve an airflow balance that would prevent pressure differentials and negative pressure zones that would interfere with appliance venting. The new text captures the many intentions of the old text while greatly simplifying it and presenting it in an easy-to-read format. This is an example of a complete rewrite of a complicated section that has resulted in much improved code language. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

602.1 Plenums Limited to One Fire Area
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 602.1 Plenums Limited to One Fire Area CHANGE TYPE: Clarification The revision clarifies that a plenum in a fire area cannot be connected to a plenum in an adjoining fire area by means of transfer ducts or openings, regardless of the presence of fire dampers. The code states that plenums are limited to a single fire area, but this is ambiguous where fire-area plenums are linked with other fire-area plenums. For example, can adjacent fire-area plenums be linked via air-transfer openings that connect the plenums? If they were so linked, the plenums would not be restricted to a single fire area, and that would violate the intent to limit the plenum to a single fire area. The only way to truly limit a plenum to a single fire area is to duct the air in the plenum back to (or from) the air handler. Links between plenums in different fire areas are prohibited. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

12/3/2017 602.2 Plenum Construction CHANGE TYPE: Modification Depending on the construction type of the building, plenums are no longer allowed to be bounded by the building materials that create the space being used as a plenum. Depending on the construction type of the building, plenums are no longer allowed to be bounded by the building materials that create the space being used as a plenum. The new text can be interpreted to indicate that stud and joist space plenums are not subject to the limits of Section because Section does not even recognize stud and joist spaces plenums as plenums, although the definition of plenum does not exclude stud and joist spaces. The new text in Section could also be interpreted to indicate that stud and joist space plenums where constructed of wood are prohibited. The author is of the opinion that Section is a standalone section that has not been intended to be affected by the new requirement for plenum enclosure construction. Stud and joist space plenums are used almost exclusively in residential and light commercial occupancies. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

602.2.1.5 Discrete Plumbing and Mechanical Products in Plenums
CHANGE TYPE: Addition The code now addresses those products that in previous editions of the code did not fall under the category of piping, wiring, ductwork, tubing, insulation and other continuous large surface area materials installed in plenums. A definition has been added to describe what is meant by discrete products. 2015 IPC, IMC and IFGC Significant Changes

12/3/2017 Table Duct Construction Minimum Sheet Metal Thickness for Single Dwelling Units CHANGE TYPE: Modification The table for duct gages for dwelling units has been replaced with thicknesses consistent with the SMACNA sheet metal construction standard. Previous editions of the IMC allowed 30-gage metal ducts for dwelling units, depending on the duct size. In the 2009 and 2012 editions, 30-gage ducts were not an option. However, there was no demonstrated justification for eliminating 30-gage sheet metal from a strength, longevity, functionality, economic or energy standpoint. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

603.9 Duct Joints, Seams and Connections
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 603.9 Duct Joints, Seams and Connections CHANGE TYPE: Modification Duct sealant tapes used on sheet-metal ducts must be listed to UL 181B as is required for sealing tapes and mastics for flexible ducts. Snap-lock and button-lock seams are no longer exempt from the sealing requirements. The text has been clarified as to the required listing based on the duct material. UL 181A is specific to fibrous glass duct systems, and UL 181B is specific to flexible and non-metallic duct systems. The code did not allow unlisted duct tapes for any purpose in the previous three editions; however, the code was silent on what listing was appropriate for duct tapes used on metal ducts. The exception was considered to be too broad and has been changed to not exempt snap-lock and button-lock joints and seams because such types allow considerable leakage. Some manufacturers place a sealant or gasket in the seams of snap-lock or button-lock ducts, which satisfies the intent of the code to have a closure (sealing) system for such ducts. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

12/3/2017 701.2 Dampered Openings CHANGE TYPE: Addition Where dampers are installed on combustion air openings, the code now requires an interlock with the appliance to prevent operation of the appliance when the damper is closed. Manual dampers are prohibited on combustion air openings. This is similar to the requirements in the IFGC and goes on to prohibit manual dampers. The new text recognizes that fire and smoke dampers could be placed in combustion air ducts, and in such cases, the dampers would have to have the capability of preventing appliance operation when they are in the closed position. Section of the IFGC requires interlocks for powered louvers. If appliance operation was allowed to continue when combustion air ducts were obstructed by dampers of any type, serious appliance malfunction and a fire hazard could result. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

802.9 Door Clearance to Vent Terminals
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 802.9 Door Clearance to Vent Terminals CHANGE TYPE: Addition To prevent damage to the vent, door or surrounding materials, doors are not permitted to swing within 12 inches of an appliance vent terminal. 802.9 Door Swing. Appliance and equipment vent terminals shall be located such that doors cannot swing within 12 inches (305 mm) horizontally of the vent terminal. Door stops or closers shall not be installed to obtain this clearance. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

903.4 Gasketed Fireplace Doors
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 903.4 Gasketed Fireplace Doors CHANGE TYPE: Addition Gasketed (sealed) doors are prohibited on factory- built fireplaces except where the fireplaces are listed for use with such doors. The International Energy Conservation Code (IECC) requires wood-burning fireplaces to be provided with tight-fitting (gasketed) doors and outdoor combustion air. The intent is to reduce the amount of indoor air that is drawn into the fireplace chimney and replaced by infiltration air. However, the majority of factory-built fireplaces are not designed or tested for use with tight-fitting doors. Such doors could interfere with the flow of cooling air and might cause the fireplace unit to overheat, creating a fire hazard. The IMC regulates these fireplaces, and this new text is intended to address this problem for fireplace doors in those cases where the doors would violate the fireplace listing. There are some fireplaces that are listed for use with tight-fitting doors and are akin to wood stoves. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

1102.3 Refrigerant Access Port Protection
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Refrigerant Access Port Protection CHANGE TYPE: Addition The requirement for making refrigerant access ports tamper resistant has been expanded to apply to existing systems when service to such systems involves adding or removing refrigerant. Access Port Protection. Refrigerant access ports shall be protected in accordance with Section whenever refrigerant is added to or recovered from refrigeration or air conditioning systems. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

Always include activity
You can provide Test Your Knowledge review questions or another activity at the end of topics and the end of the training. This will help the learners to remember the content presented. 2015 IPC, IMC and IFGC Significant Changes

Discussion Activity Of all the changes to the mechanical code, covered thus far, which would be most important for you in your jurisdiction. 2015 IPC, IMC and IFGC Significant Changes

International Fuel Gas Code, Chapters 1-8
Part 3 International Fuel Gas Code, Chapters 1-8

304.1 Combustion Air for Appliances with Power Burners
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 304.1 Combustion Air for Appliances with Power Burners CHANGE TYPE: Modification This change clarifies that the prescriptive combustion air provisions of Section 304 do not apply to appliances having power burners. 304.1 General. Air for combustion, ventilation and dilution of flue gases for appliances installed in buildings shall be provided by application of one of the methods prescribed in Sections through Where the requirements of Section are not met, outdoor air shall be introduced in accordance with one of the methods prescribed in Sections through Direct-vent appliances, gas appliances of other than natural draft design, vented gas appliances not designated as Category I and appliances equipped with power burners shall be provided with combustion, ventilation and dilution air in accordance with the appliance manufacturer’s instructions. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

12/3/2017 307.6 Condensate Pumps CHANGE TYPE: Addition Condensate pumps located in uninhabitable spaces and used with condensing fuel-fired appliances and cooling equipment must be connected to the appliance or equipment served by the pump to prevent water damage in the event of pump failure. 307.6 Condensate pumps. Condensate pumps located in uninhabitable spaces, such as attics and crawl spaces, shall be connected to the appliance or equipment served such that when the pump fails, the appliance or equipment will be prevented from operating. Pumps shall be installed in accordance with the manufacturers’ instructions. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

310.1.1 Electrical Bonding of Corrugated Stainless Steel Tubing
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Electrical Bonding of Corrugated Stainless Steel Tubing CHANGE TYPE: Addition Text has been added to address the allowable length of the bonding jumper wire and the methods of making the bonding connections. It is a well-known fact that the longer a bonding jumper is, the less effective it is because of the increasing impedance to electrical flow on the wire. Therefore, the shorter the better for jumper effectiveness. Extensive testing was performed by the CSST industry to determine how well the bonding protects the CSST from indirect lightning strikes and lightning-induced currents. The testing concluded that the bonding was effective in preventing perforations in the CSST under the conditions of the predicted lightning events. The testing also determined that the bonding jumper was functionally adequate up to approximately 100 feet in preventing arcing, thus suggesting the need for a length limit. A length limit of 75 feet was chosen to provide a safety factor and also because it was believed that 75 feet would accommodate the majority of building designs and utility service entrances. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

402.2 Maximum Gas Demand for Pipe Sizing
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 402.2 Maximum Gas Demand for Pipe Sizing CHANGE TYPE: Modification Table and the reference to it have been deleted as a result of the code requiring the actual maximum input rating of the appliances to be known and used for sizing purposes. Table in previous editions of the code provided estimates for determining the total gas demand and ultimately the size of gas piping system. The designer of a gas piping system might have used the table as a starting point in cases where the actual appliance loads were unknown, and then it was assumed that the designer would find out the actual appliance inputs and verify that the design was adequate. The table provided estimates as a placeholder in the piping system design, and the design would have to be verified after the true loads were known. This process introduced the risk that the estimate table could be relied upon solely, and the piping system might be undersized in some cases. It was felt that such design guidance tables belonged in a handbook rather than in a code and that such guidance tables could easily be misused. It is safer to never introduce an estimated load in the first place. Designers could use estimated loads if they needed to, but, the code should not condone the practice. Also, it is difficult for such a table to accurately represent the many different appliances in the marketplace. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

403.6 Plastic Pipe, Tubing and Fittings
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 403.6 Plastic Pipe, Tubing and Fittings CHANGE TYPE: Addition PVC and CPVC pipe are expressly prohibited materials for supplying fuel gas. PVC and CPVC pipe are expressly prohibited materials for supplying fuel gas. The code now references the 2013 edition of ASTM D 2513, which has been revised to address polyethylene (PE) plastic pipe, tubing and fittings only, whereas the 2008 edition addressed all plastic materials. The code had to maintain a reference to the 2008 edition of the standard in order to address plastics other than PE such as polyamide (nylon). It was determined that polyamide pipe is currently used to supply fuel gas; however, PVC and CPVC are not. Further, it was decided that because of the brittle nature of PVC and CPVC, especially at low temperatures, these materials are not suitable for conveying fuel gas. Rather than being silent, the code now prohibits what the marketplace has failed to embrace as a viable material for fuel gas. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

403.10.4 Drilled and Tapped Metallic Pipe Fittings
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Drilled and Tapped Metallic Pipe Fittings CHANGE TYPE: Modification The code now expressly prohibits the practice of drilling and tapping pipe fittings in the field except where performed in accordance with five criteria that strictly limit such practice. Occasionally, an installer will drill a hole in a schedule 40 or heavier pipe fitting and tap threads in the hole for the purpose of making a test connection or branch connection. The pipe fittings were never designed to be drilled and tapped, and the thickness of the fitting wall does not allow for even one complete thread in Schedule 40 fittings. The resulting pipe connection or plugged opening would not have sufficient threads to make a joint that is both strong and free of leakage. Lacking the required number of complete threads, such joints would rely solely on the thread-sealant paste or tape to effect a seal. The drilling and tapping of pipe fittings is prohibited in all cases except where performed in accordance with all five conditions that are intended to mitigate the risk. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

404.5 Fittings in Concealed Locations
CHANGE TYPE: Clarification This section retains its basic intent, while being completely reorganized to clarify the correct application. Threaded elbows, tees and couplings are now specifically approved for concealed locations as the code always intended. The code now provides the applicable referenced standards for fittings that are listed for concealed locations. 2015 IPC, IMC and IFGC Significant Changes

404.7 Protection of Concealed Piping against Physical Damage
CHANGE TYPE: Modification The section on protection of piping has been completely rewritten to address more than just bored holes and notches in structural members. It now addresses piping parallel to framing members and piping within framing members. The new text requires that the protection extend well beyond the edge of members that are bored or notched. 2015 IPC, IMC and IFGC Significant Changes

12/3/2017 Pipe Cleaning CHANGE TYPE: Addition The code now specifically prohibits the practice of using fuel gas as a medium for flushing foreign matter and debris from fuel-supply piping. Pipe cleaning. The use of a flammable or combustible gas to clean or remove debris from a piping system shall be prohibited. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

410.2 Medium-Pressure Regulators
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 410.2 Medium-Pressure Regulators CHANGE TYPE: Modification Line regulators installed in rigid piping must have a union installed to allow removal of the regulator. Line regulators installed in rigid piping must have a union installed to allow removal of the regulator. MP regulators are line pressure regulators that serve to reduce pressures that are above 0.5 psi and less than or equal to 5 psi to some lower pressure. They are typically installed in 2-psi and 5-psi gas-distribution systems that serve appliances having a maximum input pressure of 0.5 psi (14 inches water column). If such regulators are installed with steel piping on the inlet and outlet side, the regulators cannot be removed or isolated without disassembly of the piping system for some distance or cutting the piping. To facilitate removal or isolation of the regulator, a union fitting must be placed near the inlet or outlet side of the regulator. This is simply a common-sense provision. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

411.1 Connecting Portable Outdoor Appliances
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 411.1 Connecting Portable Outdoor Appliances CHANGE TYPE: Modification Where portable gas appliances are used outdoors, such as gas grills and patio heaters, the options for connecting to the gas distribution system are practically limited to gas hoses designed for the purpose. Such hoses must comply with ANSI Z21.54. Most appliance connectors are not designed to be used with any appliance that can be readily moved. All appliance connectors must be used within the parameters of their listings. For outdoor portable appliances, new method 8 is the only apparent option. Outdoor gas-hose connectors have to be resistant to mechanical damage, possible heat exposure and the harmful effects of exposure to the weather. Connectors listed to ANSI Z21.54 are evaluated and tested for the particularly harsh environment of outdoor use. The gas hose connector must be located entirely outdoors and must be connected to the gas piping system at a point outdoors. The point of connection to the gas distribution system piping must be through a listed device that allows the hose to be readily manually disconnected or through an appliance shutoff valve. Quick-disconnect devices have safety features such as thermal shutoffs that will close the valve when exposed to high temperatures and interlocking systems that will not allow the hose to be removed until the manual gas valve is closed. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

411.1.1 Connectors for Commercial Cooking Appliances
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Connectors for Commercial Cooking Appliances CHANGE TYPE: Modification Specific installation requirements have been added for the safe installation of ANSI Z21.69 connectors for commercial cooking appliances. The options to connect the cooking appliance with semirigid tubing or rigid pipe have been removed. Commercial cooking appliances that are on casters or can be moved periodically must be connected to the gas supply with connectors that are listed to ANSI Z Rigid piping and semirigid metal tubing (copper or aluminum) are no longer allowed to connect appliances that are moved for cleaning and maintenance purposes. Semirigid tubing will work loose, harden and fail if repeatedly moved. Connection by rigid steel piping requires that unions be disassembled and the appliance be perfectly repositioned with respect to the gas supply piping, all of which is very impractical and risky. Cooking appliances are almost never connected with rigid pipe because of the difficulty of doing so, especially where the appliances are moved. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

502.7.1 Door Clearance to Vent Terminals
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Door Clearance to Vent Terminals CHANGE TYPE: Addition Coverage has been added to address the condition where a door could impact or come too close to an appliance vent terminal. Door swing. Appliance and equipment vent terminals shall be located such that doors cannot swing within 12 inches (305 mm) horizontally of the vent terminal. Door stops or closers shall not be installed to obtain this clearance. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

503.4.1 Plastic Piping for Appliance Vents
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Plastic Piping for Appliance Vents CHANGE TYPE: Modification The approval of plastic pipe for venting appliances is no longer a responsibility of the code official; instead, that responsibility rests with the appliance manufacturer and the appliance listing agency. In the past, it was difficult to place the approval burden on the code official because the code official was not in a position to determine what venting materials were suitable and safe for venting various appliances. Such decisions should have been left to design engineers, manufacturers and the testing and listing agencies that list the appliances. The previous code text did not actually require that the appliance be listed for use with specific venting system materials, although this was implied by the text, and it is required in the appliance standards. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

503.6.9.3 Sizing of Plastic Pipe Vents
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 Sizing of Plastic Pipe Vents CHANGE TYPE: Modification The code previously spoke only of vents that are defined as listed and labeled factory-made products. The code is no longer silent on the sizing of vents that do not fall under the definition of “vent.” Because plastic pipes such PVC, ABS and CPVC plumbing pipes are not listed and labeled as appliance vents, (see the definition of “vent”), the code was silent on how to size such pipes. The sizing is covered in the appliance manufacturer’s instructions, and the code requires compliance with such instructions. However, for consistency, this section has been modified to address both listed vents and unlisted materials used as vents. For example, PVC pipe that vents a Category IV furnace is not listed as a vent; rather, it is a material that is used as a vent, and the appliance is listed for use with the PVC pipe. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

503.8 Venting System Termination Location
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 503.8 Venting System Termination Location CHANGE TYPE: Modification Text has been added to address the location of sidewall vent terminals with respect to adjoining buildings. Previous editions of the code were silent on this subject, and the appliance manufacturer’s instructions are typically silent as well. A common issue arises where buildings, especially homes, are located very close to each other, and sidewall-vented appliances are installed with the vent terminals directed toward the neighboring home. The concern is that combustion gases will enter the adjacent building through openings in the exterior walls that face the appliance vent terminal. This section applies only to Category IV (condensing) appliances that are sidewall vented with stainless steel or plastic vents. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

614.5 Dryer Exhaust Duct Power Ventilators
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 614.5 Dryer Exhaust Duct Power Ventilators CHANGE TYPE: Addition New text recognizes the use of dryer exhaust duct power ventilators (DEDPVs) for installations that exceed the allowable exhaust duct length for clothes dryers. 614.5 Dryer exhaust duct power ventilators. Domestic dryer exhaust duct power ventilators shall be listed and labeled to UL705 for use in dryer exhaust duct systems. The dryer exhaust duct power ventilator shall be installed in accordance with the manufacturer’s instructions. Dryer exhaust duct power ventilator length. The maximum length of the exhaust duct shall be determined by the dryer exhaust duct power ventilator manufacturer’s installation instructions. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

623.2 Prohibited Location of Commercial Cooking Appliances
2015 IPC, IMC and IFGC Significant Changes 12/3/2017 623.2 Prohibited Location of Commercial Cooking Appliances CHANGE TYPE: Modification The code has been clarified so that it would not inadvertently prohibit the installation of cooking appliances that are listed as both commercial and domestic appliances. Commercial cooking appliances are prohibited in dwelling units and domestic environments because they lack special safety features that domestic appliances must possess. There are appliances built today that are listed as commercial appliances and that are also listed to the domestic appliance standard; therefore, such appliances are allowed in any occupancy. The previous code text would prohibit an appliance listed as a commercial appliance despite the fact that the appliance was listed as both commercial and domestic. The code text has been revised to eliminate this unintended consequence. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

Discussion Activity Of all the changes to the fuel gas code, covered thus far, which would be most important for you in your jurisdiction. 2015 IPC, IMC and IFGC Significant Changes

Final Reflection This slide will help the learner to reflect on the day and what they will take back to the job and apply. 2015 IPC, IMC and IFGC Significant Changes

12/3/2017 International Code Council is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available on request. This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation. 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

12/3/2017 Copyright Materials This presentation is protected by US and International Copyright laws. Reproduction, distribution, display and use of the presentation without written permission of the speaker is prohibited. © International Code Council 2014 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

Thank you for participating
2015 IPC, IMC and IFGC Significant Changes Thank you for participating To schedule a seminar, contact: The ICC Training & Education Department 1-888-ICC-SAFE ( ) Ext or 2015 IPC, IMC and IFGC Significant Changes Copyright 2014 International Code Council

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