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HydroMax Siphonic Drainage Leaders in Siphonic Drainage.

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Presentation on theme: "HydroMax Siphonic Drainage Leaders in Siphonic Drainage."— Presentation transcript:

1 HydroMax Siphonic Drainage Leaders in Siphonic Drainage

2 Topics Covered Brief History of Siphonic Drainage General Principles of Gravity Rainwater Drainage Principles of Siphonic Drainage Benefits and applications of Siphonic Drainage Installation and Maintenance

3 3 Prior to March 2007, there were no comprehensive product and design standards for siphonic drainage. As such siphonic drainage was promoted by suppliers in different formats with various slants aimed at their own offerings The HydroMax focus is on offering high quality, sustainable products with highly accurate and user friendly design software Our approach is to dispel the smoke and mirrors educate how they work in accordance with the current British and/or American Standards Technical Support to Design Engineers and Registered Installers Introduction to Siphonic Drainage

4 4 Siphonic Drainage – Brief History Concept invented in Finland by Olavi Ebling in late 1960s First major installation in Sweden in Unregulated Industry Grew through 1980s UK Government Commissioned Research during the 1990s (Refer HR Wallingford SR 463 & SR 473) European Standard BS EN introduced in 2000 (1 st Standard to include a section for Siphonic drains) 2005 – ASME A Siphonic Drain Test issued in USA 2006 – Singapore Standard SS 525 includes siphonic drainage 2007 – Comprehensive Siphonic Drainage Standards published in UK and USA (BS 8490 and APSE 45)

5 What is HydroMax Siphonic Roof Drainage? HydroMax is an innovative solution which utilises the power of a natural siphon to create a high-performance roof drainage solution.

6 HydroMax is an Engineered Solution which provides many Technical Benefits HydroMax offers cost savings normally ranging from 25% to 45%! Why use HydroMax Siphonic Roof Drainage?

7 7 What is wrong with Traditional Gravity Drainage Systems? Traditional Gravity drainage systems work but they are inefficient and have a number of factors restricting performance.

8 8 Restrictive Factors of Gravity Drainage 1.The water flow-rate is dictated by the gradient available (this gradient also restricts the distance a pipe can travel). 2.Multiple rainwater pipes in locations largely dictated by the gravity hydraulics rather than design team choice. 3.Gravity drains require air to transport water. 4.Vortex formation within vertical gravity pipes results in the water being transported in an inefficient spiral motion rather than straight through the pipe. 5.The driving force is only the depth of ponding or head of water above the roof drain.

9 Gravity 10 Drain – Depth = 7.3 to Discharge 1500 GPM High Performance Gravity Drain (from Manufacturers web-site) (250mm Drain – Depth = 185mm to Discharge 95 l/s)

10 HydroMax 125mm (5) Drain 125mm Drain – Depth = 95mm to Discharge 95 l/s Equivalent Flow (95 l/s – 1500GPM) Half the Diameter Half the ponding depth of the Gravity drain

11 Vertical Gravity pipes run full at only 1/3 water water in annular flow air core

12 Horizontal (Sloping) Gravity pipes run full at only 2/3 water

13 Extensive Underground Drainage Drainage under Building Floor Multiple Downpipes Typical Traditional Gravity Drainage System Sloping Underground Drainage makes for difficult routing to attenuation/harvesting

14 14 Principles of Gravity Drainage Vortex motion A large amount of Air is required to move a small amount of water. Extremely Inefficient Annular Flow Water adheres to pipe wall Central Air Core

15 Siphonic Drainage No Air! Why is HydroMax different from gravity drainage? Pipes run 100% full bore

16 16 Principles of HydroMax Siphonic Drainage The Siphonic Roof Drain eliminates air entering the pipe promoting water filled pipework The full bore of the pipe work carries the rainwater Water, without air, accelerates down the vertical downpipe, creating negative pressure and naturally generating a high performance siphonic flow The full height of the building provides the energy for this highly efficient Rainwater Drainage Solution

17 Siphonic Drainage - How it works P Atmos - gh The inducer on the roof drain prevents air ingress and so Rainwater falling down the vertical pipe accelerates, creating negative pressure

18 P Atmos - gh Siphonic Drainage - How it works More Height = Greater Negative pressure

19 P Atmos - gh Greater Negative Pressure = Higher Flow Rates P Atmos - gh The full height of the building provides the energy for this highly efficient Rainwater Drainage Solution Siphonic Drainage - How it works

20 Tail-pipes Horizontal collector pipe Downpipe Discharge Roof or Gutter HydroMax Roof Drain Siphonic Drainage - How it works HydroMax Siphonic Systems are self-draining therefore the pipes are empty before a rainfall event

21 HydroMax System with Tailpipes primed Roof HydroMax Roof Drain Tail-pipes Horizontal Collector Pipe Drop pipe Discharge Pressure

22 Gravity flow in pipework Air above water Stage 1 - Wavy or Gravity flow Priming of Main Pipe Work

23 Stage 2 - Plug flow Air pockets driven down pipework Plug of water filling whole pipe at high velocities which achieves self-cleansing. Tests have shown that self-cleansing can be achieved at as low as 10% to 15% of the design rainfall rate. Priming of Main Pipe Work

24 Stage 3 - Bubble flow Air bubbles in suspension carried at high velocity Water filling whole pipe Priming of Main Pipe Work

25 Stage 4 - Full-bore flow Water filling whole pipe No more air entry – Air within Pipe now Fully Purged Priming of Main Pipe Work

26 Roof or Gutter HydroMax Roof Drain Tail-pipes Horizontal Carrier Pipe Downpipe Discharge Negative Pressure Fully Primed HydroMax System The full height of the building provides the energy for this highly efficient Rainwater Drainage Solution

27 27 Principles of HydroMax Siphonic Eliminate Air Ingress Pipes run Full-Bore with Water Building Height provides energy for High Self- Cleansing Velocities Extremely Efficient

28 28 HydroMax Siphonic Roof Drainage Video Click Here

29 29 HydroMax Simulation of Non-Maintained Roof Click Here

30 High Performance Roof Drains Significant Reduction in Underground Drainage Route to Harvesting or Attenuation No Drainage Under Building Flexible, Downpipe Positioning Siphonic Roof Drainage System

31 31 System Comparison air core HydroMax Siphonic Traditional Gravity water in annular flow water No Air air core

32 32 60m 100m HydroMax Siphonic Scheme 360 metres HDPE Pipework Diameters 56mm to 200mm Traditional Gravity Solution 530 metres Pipework Diameters 160mm to 450mm

33 33 HydroMax System Termination Siphonic pipework should enter manhole chamber above the drain invert and be clear of any standing water to ensure free discharge Manhole or Catch Pit to have Grate Cover Note: British Standard BS 8490 states the size of free area for the Grate should be twice cross sectional area of siphonic pipe. American ASPE Technical Design Standard 45 does not dictate the size of vented area.

34 HydroMax Siphonic System Termination Vertical Siphonic Pipe Offset (if required) to line up with below grade pipe Important: Below Grade Drain must be vented and sized to take the volume of discharge under Gravity flow conditions. Do not size to match siphonic Pipe diameter. Flex-Seal flexible, expansion coupling

35 Important: If siphonic drainage is utilised to drain part way down a high rise building – A siphon break point must be adequately vented to atmosphere at the point of transition to gravity flow. HydroMax Siphonic System Termination

36 Ventilated to Atmosphere Break to Gravity flow Siphonic flow Recommended Vent size being Two-Thirds Gravity Pipe size (two-thirds air to one third water in the gravity pipe) HydroMax Siphonic System Termination

37 37 Suitable Projects for Siphonic Drainage Retail Chains

38 Royal Ascot Racecourse Ricoh Stadium and Arena, Coventry Stadium of Light, Sunderland Suitable Projects for Siphonic Drainage Stadia

39 Dundrum Retail Shopping Malls with multi-level Car Parks Suitable Projects for Siphonic Drainage 313 Orchard Road, Singapore

40 Commercial Office Buildings Suitable Projects for Siphonic Drainage Accident Fund, Lansing E-Tek Flagship TrinidadStryker HQ, Newbury

41 Accommodation/Hotels/Prisons Suitable Projects for Siphonic Drainage Student Accommodation, Wembley Johnstone County Detention Center Ibis Hotel, Singapore

42 Hospitals Suitable Projects for Siphonic Drainage Forest Park Medical Center, Dallas Mercy Hospital, Des Moines, IA

43 Apartment Blocks Podium Decks Suitable Projects for Siphonic Drainage

44 Green Roofs Suitable Projects for Siphonic Drainage

45 45 Siphonic Drains installed at waterproofing membrane level Suitable Projects for Siphonic Drainage Green Roofs

46 Airports Suitable Projects for Siphonic Drainage Gimhae South Korea

47 47 Warehousing & Distribution Centres 110,000m² for Tesco Suitable Projects for Siphonic Drainage

48 48 Manufacturing Plants Suitable Projects for Siphonic Drainage

49 49 Flagship Projects Scottish Parliament Suitable Projects for Siphonic Drainage

50 50 Flagship Projects Masdar City MIST 1B, Abu Dhabi Suitable Projects for Siphonic Drainage

51 51 50mm Balcony Siphonic Roof Drain HydroMax Siphonic Products This is a special drain for multi floor balcony drainage. The drain has a built in Anti-Backflow device. Flow Rate Max. = 1.5 l/s (Litres per Second)

52 52 50mm Terrace Siphonic Roof Drain HydroMax Siphonic Products Flow Rate Min. = 1.5 l/s (Litres per Second) up to Max. = 25 l/s

53 53 75mm Siphonic Roof Drain Our Metric series of drains come in a range of models for compatibility with all roof types HydroMax Siphonic Products Flow Rate Min. = 1.5 l/s (Litres per Second) up to Max. = 25 l/s

54 54 75mm Siphonic Overflow Roof Drain Our Metric series of Overflow drains come in a range of models for compatibility with all roof types HydroMax Siphonic Products Flow Rate Min. = 1.5 l/s (Litres per Second) up to Max. = 25 l/s

55 55 125mm Siphonic Roof Drain Our Metric series of drains come in a range of models for compatibility with all roof types HydroMax Siphonic Products Flow Rate Min. = 10 l/s (Litres per Second) up to Max. = 100 l/s

56 56 Range of Accessories for Our Metric Series of Drains HydroMax Siphonic Products Leafguards Gravel Guards Car Park Drains Bespoke Accessories

57 57 3 Siphonic Roof Drain Our North American series of drains have all been tested to ASME :2005 – IAPMO certified (file number 5305) Wade-HydroMax Siphonic Products Flow Rate Min. = 23 GPM (Gallons per Minute ) up to Max. = 415 GPM

58 58 4 Siphonic Roof Drain Our North American series of drains have all been tested to ASME :2005 – IAPMO certified (file number 5305) Wade-HydroMax Siphonic Products Flow Rate Min. = 75 GPM (Gallons per Minute ) up to Max. = 750 GPM

59 59 5 Siphonic Roof Drain Our North American series of drains have all been tested to ASME :2005 – IAPMO certified (file number 5305) Wade-HydroMax Siphonic Products Flow Rate Min. = 120 GPM (Gallons per Minute ) up to Max. = 1300 GPM

60 60 6 Siphonic Roof Drain Our North American series of drains have all been tested to ASME :2005 – IAPMO certified (file number 5305) Wade-HydroMax Siphonic Products Flow Rate Min. = 160 GPM (Gallons per Minute ) up to Max. = 1800 GPM

61 61 3, 4, 5 and 6 Siphonic Roof Overflow Drain Our North American series of drains have all been tested to ASME :2005 – IAPMO certified (file number 5305) Wade-HydroMax Siphonic Products C.I. No-Hub Outlet K factor Minimum GPM Inflow Maximum GPM Inflow

62 62 3, 4, 5 and 6 Drain Accessories Leafguards, Debris Guards, Underdeck Clamps and Bearing Pans are available for all drains. Wade-HydroMax Siphonic Products Our 3 and 4 Drains are available as Podium Deck Drains Drain shown with Debris Guard

63 63 High Performance Versatile and Compatible with any Roof Compact for installation in gutters/scuppers Anti Tamper Fastening of one-piece Inducer Proven track record of Low Maintenance HydroMax Siphonic Drain Benefits

64 64 HydroMax HDPE Siphonic System Pre-Fabricated in Factory Controlled Conditions with Engineered Rail Fastening System

65 65 HydroMax Siphonic System 60,000m² Roof Only 4 Rainwater Downpipes draining the Main Roof

66 66 HydroMax Collector Pipe at High Level HydroMax Siphonic System

67 67 Level, Small Diameter, Pipes Makes for Easy Co-ordination with structure and services HydroMax Siphonic System

68 68 HydroMax Pipework Installed Absolutely Flat Level at High level HydroMax Siphonic System

69 Development of Key Standards & Codes BS EN :2000 (includes Siphonic Drain Test) ASME :2005 (Siphonic Drain Test) ASPE Technical Design Standard 45:2007 (Design, Installation & Product Standard) BS 8490:2007 (Design, Installation & Product Test Standard)

70 Development of HydroMax Consultation with HR Wallingford (previously commissioned by UK Government to study siphonic drainage) ensured our offering progressed the technology above competitors systems HydroTechnic hydraulic calculations report extreme conditions giving high accuracy (other systems report average hydraulic conditions) Independently tested by Hydraulic Research Centre Wallingford (HRW) for compliance with BS EN :2000 Independently tested to ASME (IAPMO File #5305) Full Compliance with current SS525, BS 8490:2007 & ASPE % Success Rate

71 Development of HydroMax Full Compliance with SS525:2006 Full Compliance with BS 8490:2007 Full Compliance with ASPE Design & Engineering Standard % Success Rate

72 72 Primary and Overflow Systems Primary Roof Drains installed at roof level or at gutter sole level Drains direct to underground drainage 50mm Raised Inlet to Drain Overflow Roof Drain Inlet raised to 50mm above gutter sole. Drains to Atmosphere often at high level or to walkways or car parks Must not connect to Primary System (as this would normally be a vent) Using HydroMax Overflow System can offer the same technical and commercial benefits obtained using the HydroMax Primary Drains

73 73 Maintenance by Design Roof Level Raised Inducer Level Primary Drain Overflow Drain Regional Options: Dry Season Covers for Gulf Region

74 74 Siphonic Drainage Analytical Design Program HydroMax provides the following: Web based HydroTechnic program for easy Technical Support Fast Accurate Calculations in full compliance with SS525, BS 8490 & ASPE 45 Advanced Edit Functions to accommodate on-site changes Program Generation of Pre-Fabrication Drawings (Eliminates risk of human interface errors) Exports data in electronic format for O & M files

75 Following calculation of rainfall inflows and determination of required pipe routing, the Design Engineer Draws the piping system into the calculation program Metric Version USA Version ft/in and GPM Siphonic Drainage Analytical Design Program

76 76 Pipe diameters are edited to find the optimum solution Metric Version USA Version

77 77 Key Advantages with HydroMax Drains independently tested to: –BS 8490:2007 –ASME :2005 Designs to BS 8490 or ASPE 45 Independently tested HydroTechnic design software (confirmed to have unsurpassed accuracy) Range of High Performance Roof Drains (Outlets) HDPE Pipes to EN 1519 (not for North American Market)

78 78 Key Advantages for Building Owners High Performance, Self-Cleansing Roof Drainage System Fewer Rainwater Downpipes routed to convenient positions providing an increased and flexible use of floor space Proven Record of Low Maintenance Elimination of underground drainage, manholes, etc. within the building footprint

79 79 Key Advantages for the Design Team Smaller diameter horizontal pipework installed level An Engineered Solution allowing choice of discharge locations Flexible Pipe routing with easy co-ordination of services Rainwater Management - HydroMax can route pipework to attenuation/rainwater harvesting.

80 80 Key Advantages for the Main Contractor Improved Construction Build Program Significant Cost Savings A dry building envelope is attained at an early stage of construction allowing fit-out works to proceed earlier Less Trench work for below ground drainage saving excavation, soil treatment, pipe laying, back fill compaction, etc.

81 81 Engineers Training Day – Topics Covered Key Aspects of BS 8490:2007/ASPE 45/SS 525 Hydraulic Parameters Piping Layout Design (dos and don'ts) Hands-on HydroTechnic training Understanding how to Edit Systems within HydroTechnic to cater for design or onsite changes Specification Writing

82 82 Information Requirements For HydroMax to Provide Concept Designs Design Rainfall Rate Roof Plan Drawings (AutoCAD) Floor Plan Drawings (AutoCAD) Sections/Elevation Drawings (AutoCAD) Underground drainage Connections Attenuation or Rainwater Harvesting Requirements Gutter Profile (to allow compatibility checks) Specification (we can provide CSI or R10 type spec.)

83 HydroMax Siphonic Drainage Leaders in Siphonic Drainage


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