Now you know the How & Why of Fire Flow Tests a valuable tool in the engineer’s arsenal. The information collected from this test can be used to predict flow-rates and residual pressures. If the hydrant is a dry barrel type, note that water drains properly from the hydrant. Remove gauge cap and replace hydrant cap. This can be used to account for the amount of water used during the flow test. Record the number of minutes that water was flowing.Slowly close gate valve on flow hydrant, then close the hydrant.
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FIRE SPRINKLER DESIGN FLOW TEST FULL
When hydrant is full of water, open gate valve to desired flow-rate (usually full open). Slowly open hydrant using the gate valve to purge air from the hydrant.Record static pressure reading from gauge cap.Attach the hose to the Pitotless Nozzle and Little Hose Monster assembly.Attach hydrant gate valve to the hydrant and close the gate valve.Attach Remote Reader and gauge to the Pitotless Nozzle.Set the Little Hose Monster™ with gauge to the Pitotless Nozzle™ in an appropriate location for flowing water.Open test hydrant, vent air from hydrant body through the valve on the gauge cap assembly.
![fire sprinkler design flow test fire sprinkler design flow test](https://flamestopau.b-cdn.net/6378-thickbox_default/sprinkler-flow-test-kit.jpg)
The information derived from this test is used by city planners and contractors to consider the water supply for general use and fire sprinkler systems.Īt the test hydrant (pressure hydrant, static/residual hydrant): A Main Capacity Test evaluates the water supply of the fire main at the location of the test hydrant.
FIRE SPRINKLER DESIGN FLOW TEST HOW TO
If you are performing fire flow tests of hydrants, use this test (residual hydrant and flow hydrant are the same one).įor the purpose of this Blog we will only discuss how to perform a Main Capacity Flow Test, which is the two hydrant flow test.
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In general, fire flow tests are conducted on fire hydrants to determine the water availability. Fire Flow Tests, also known as Hydrant Flow Tests can be performed for several different reasons.