HYDRANT FLOW CALCULATOR

To use this calculator highlight the first box, then enter your new value. Press Tab, the flows will recalculate. Continue entering new values until all values are correct for this flow.
Static:
psi before flowing
Residual: psi while flowing
Pitot: pitot gage reading
Diameter: size of hydrant opening (2 1/2"=2.5) or (4 1/2 = 4.5)
This hydrant is flowing: GPM
At 20 psi this hydrant will flow about: GPM