4Compliance to NFPA 20 100% Flow at 100% Head Maximum of 140% of Head at ShutoffMinimum of 65% of Head at 150% of Flow
5Maximum Allowed Pressure The pump shutoff pressure plus the maximum static suction pressure shall not exceed the pressure for which the system components are rated for.Pressure relief valves shall not be used as a means to meet this requirement.Variable speed pressure limiting control drivers are acceptable in meeting this requirement (new in NFPA 2003).
6Fire Pump Drivers Electric Motors Diesel Engines Steam Turbines Combination of the above
8Suction Pipe & Fittings Suction can be either from a city water supply or a fire water storage tank.Suction shall be sized so that at 150% of rated capacity the velocity in the suction pipe located 10 pipe diameters upstream of the pump suction flange shall not exceed 15 ft/sec.Concentric reducers are not allowed in the suction piping.UL/FM OS&Y gate valve only.
10Relief Valves Used on Diesel Engines Used with Variable speed pressure limiting control devicesSpring direct acting or pilot operated.Relief discharges to an open or closed waste cone.Discharges to suction source or splash block
11Test MetersWhere water usage or discharge is not permitted for the duration of the test.Installed with upstream and downstream pipe runs per meter manufacturer.Where meter downstream run goes back to suction side of pump proper pipe runs must be followed per NFPA-20.A throttling valve shall be installed downstream of the flow meter.
12Hose Valve Test Header Hose test valves are rated for 250 GPM. Hose valves shall be mounted on a test head.A UL/FM isolation valve shall be installed upstream of the test head.A Ball drip valve shall be installed if the test head is mounted outside the building to prevent freezing.
15Electric Drive PumpsPower derived by a reliable power source or two or more approved independent sources.Second power source shall be from a second utility or on-site power generationAutomatic Transfer switch to be used if two or more power sources are used.
16Electric Drive Starting Methods Across The LinePart WindingWye Delta (open)Wye Delta (closed)Primary ResistanceAuto TransformerSolid State
20Pressure Maintenance Pumps Rated for not less than normal leak load. (normally 1% of rated fire flow and 10 psig above rated boost pressure.Discharge pressure shall be sufficient to maintain desired system pressure.Where the shutoff pressure is greater than the pressure ratings of the system components a relief valve shall be installed on the pump discharge.
21House Utilities (per NFPA-20) Approved or listed source of heatArtificial LightingEmergency lighting (including fixed and portable).VentilationDrainageConvenience outlet