How do I use the results to calculate a pump in a water model?.If a new test is needed how long will it take to get my results?Ī fire flow test typically takes two to three weeks after Loudoun Water receives payment to issue results.What charges are associated with performing a new flow test?Ī charge of $350 per new flow test performed is charged to the requesting party.Independent companies are not allowed to operate hydrants within our jurisdiction. Loudoun Water owns and maintains all of the fire hydrants within our system. Can I order my own independent fire hydrant flow test?.Once the invoice has been paid the new flow test will be scheduled. If you need more recent information with a new test performed please request the Loudoun Water engineer to create an invoice. The most recent flow test information in the area requested will be sent to you within 1 – 3 business days. How do I request fire hydrant flow test information?įill out the Fire Hydrant Flow Test Request.Results of the tests are available upon request to customers who have a need for the results. The results of the fire flow test are reviewed by engineering staff and then recorded into the fire flow test database. While the flow is steady at hydrants #2 and #3, the residual pressure is recorded at hydrant #1, measuring the drop in water pressure. Both hydrants #2 and #3 will flow between 500 and 2,000 gallons per minute. A hand-held pitot pressure gauge is used to measure the residual pressure while water is flowing from hydrants #2 and #3.
The remaining two hydrants are opened to allow water to flow out as fast as possible. A pressure gauge is placed on one hydrant to record the static pressure this is hydrant #1. They are generally known as fire flow tests as the highest demands on the system occur when fighting a fire.Ī fire hydrant flow test is performed for a specific area by using three fire hydrants. Hydrant flow tests are required for fire sprinkler design and for water modeling purposes. Hydrant flow tests are conducted to measure real world pressure and flow in the water system.
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