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Engineering : Fire Pump & Booster System Sizing

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#1 Determining pump discharge pressure

Pressure required at the highest elevation
Static head - elevation in feet from pump to highest fixture divided by 2.31
Friction loss in system - 10 PSI is usually safe for fire pumps & booster systems
Pressure drop through building components, i.e. blackflow preventer
(Add 5 PSI to above for booster systems only for internal loss)
Total lines 1 through 4 to obtain system pressure
Deduct minimum suction pressure
Pump discharge pressure

#2 Flow test information and voltage

Static pressure (no flow)
Residual pressure at GPM
Distance from flow information from building in feet
Voltage for site /60/3

#3 System capacity for booster systems

Fixture
 		 Type of supply
 		 Units
 		 No. of fixtures
 
Water Closet flush valve 10
Water Closet flush tank 5
Urinal flush valve 5
Sink (kitchen/bath) faucet 2
Sink (service) faucet 4
Dishwasher automatic 2
Washing machine automatic 4
Hose bib faucet 4
Shower (public) shower head 8
Shower (private) shower head 4
     

#4 System capacity for fire pumps

Sprinkler system demand

#5 Special Requirements

Job Name:


Name:


Company:
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