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How does a water flow test work?

A fire 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.

How do you conduct a flow test?

The flow testing procedure should be conducted, as follows: Position one personnel at the test hydrant, and one at the flow hydrant. Attach gauge to test hydrant. Open hydrant; record static pressure reading. Record outlet coefficient size of flow hydrant. Attach pitot gauge to flow hydrant.

How are hydrants flow tested?

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. A hand-held pitot pressure gauge is used to measure the residual pressure while water is flowing from hydrants #2 and #3.

How do you calculate hydrant flow?

0:00 3:42 Converting Hydrant Flow Test Results to GPM - YouTube YouTube Start of suggested clip End of suggested clip Times the diameter squared of your open orifice times your square root of your flow pressure whichMoreTimes the diameter squared of your open orifice times your square root of your flow pressure which is going to be determined from your pitot gauge.

How do you do a flow test on a fire hydrant?

According to this standard, the proper way to test a hydrant and water main is to put a cap gauge on the test hydrant and take a static reading. Then proceed down stream to the next flow hydrant and back up stream to the closest flow hydrant and flow both at the same time.

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How do you do a flow test on a fire hydrant?

According to this standard, the proper way to test a hydrant and water main is to put a cap gauge on the test hydrant and take a static reading. Then proceed down stream to the next flow hydrant and back up stream to the closest flow hydrant and flow both at the same time.

How often are hydrants flow tested?

NFPA 291 requires that fire hydrant flow tests be performed every 5 years and fire hydrant inspections be performed annually.

How often should fire hydrants be serviced?

Hydrants should be inspected on a regular basis at least once a year. Dry-barrel fire hydrants may require two inspections per year, in the spring and fall. Every hydrant inspection should be documented, and problems with a hydrant should be reported immediately.

How is hydrant pressure measured?

Remove the nozzle cap of the pressure hydrant and add the pressure gauge to its outlet. Open its valve completely and gather static pressure reading (Water should not be flowing). Then, open the flowing hydrant's valve. Always be cautious of nearby obstacles and traffic.

How do you conduct a flow test?

The flow testing procedure should be conducted, as follows: Position one personnel at the test hydrant, and one at the flow hydrant. Attach gauge to test hydrant. Open hydrant; record static pressure reading. Record outlet coefficient size of flow hydrant. Attach pitot gauge to flow hydrant.

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