Get Tx Request For Hydrant Flow Testing - City Of Round Rock 2015

Slowly open the valve on the test hydrant and allow water under pressure into the hydrant. Allow a few minutes for the pressure reading on the gauge to stabilize. This pressure is referred to as the static pressure and represents the water pressure in the water main as measured at the elevation of the hydrant outlet.

NFPA 291 provides guidance on fire flow tests and marking of hydrants in order to determine and indicate the relative available fire service water supply from hydrants and to identify possible deficiencies which could be corrected to ensure adequate fire flows as needed.

A hydrant flow test is performed for a specific area by using three fire hydrants. A pressure gauge is placed on one hydrant to record the static pressure; this is hydrant #1. The remaining two hydrants are opened to allow water to flow out as fast as possible.

Hydrants should be tested every six months to ensure the water pressure and flow rates are adequate and flow tested annually to check the pressure on the most hydraulically disadvantaged hydrant within a circuit.

You will find guidance in NFPA and is usually 250 gpm for low hazards and 500 gpm for high hazards and storage. But may also vary, such as with the use of ESFR. Note that some occupancies may require up to 750 gpm.

NFPA 291 stipulates hydrant flow tests every five years to ensure that changing conditions in the piping and system demands won't impede hydrants' ability to deliver water. 4.15. 1 Public fire hydrants should be flow tested every 5 years to verify capacity and marking of the hydrant.

NFPA 291 requires that fire hydrant flow tests be performed every 5 years and fire hydrant inspections be performed annually. Inspections and testing should be performed by a licensed professional.