Blue Line Hydrant Flow Calculator

Inputs

Static Pressure (psi) Residual Pressure (psi) Pitot Pressure (psi) Orifice Diameter (in) Discharge Coefficient

Formula used for flowed hydrant discharge:
Qf = 29.84 × C × d² × √Pitot
Available flow at 20 psi (NFPA-style):
Q20 = Qf × ((Ps - 20)/(Ps - Pr))^0.54

Results

Flowed Hydrant (Qf)—

Available @ 20 psi—

Rated Capacity—