Fire Hydrant Flow Calculator

  • Label with hydrant number____________, and ___________________________________address.

  • Date of hydrant flow _______________________________.

  • Sign ___________________________________________.

  • Turn on active X.
  • Use the tab key to navigate.
  • Tab between each box to update the calculation.
  • Be sure to tab past your final entry for a correct calculation.
  • Label page with number, address, and date.
  • Print out this page.

psi before flowing
Residual: psi while flowing
Pitot: pitot gage reading
Diameter: size of opening tested
This hydrant is flowing: GPM from the test outlet
Projected available hydrant flow: GPM Note 1
2nd Static: secondary psi before flowing
2nd Residual: secondary psi while flowing
The main can be expected to flow about: GPM

  1. Projected available flows calculated at 20 psi residual, or the static pressure for low pressure hydrants having static pressures of less than 40 psi.