Final Question
2000

 What pump discharge pressure (PDP) should the operator set?

A fire engine is supplying a handline with the following setup:

  • Hose size: 1¾-inch
  • Hose length: 200 ft
  • Flow rate: 150 GPM
  • Nozzle pressure: 100 psi (combination nozzle)
  • Appliance loss: 0 psi
  • Elevation change: 0 psi
  • C=15.5

FL=C×Q2×L & 

PDP=NP+FL

What is Pump Discharge Pressure = 170 psi

FL=15.5×(1.5)2×2

FL=15.5×2.25×2

FL=69.75≈70 

PDP=100+70

PDP=170


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