HomeMy WebLinkAboutSDP202100053 Study 2022-03-10JUbemadeCounty Date of Report
ServiceAuth♦rity Hydrant Flow 3/10/2022
Test Report
168 6polnap RoaO Charlottesville. VA 22911 (434) 9774511
Location BISHOPGATE LN Pressure Zone CROZET SERVICE AREA
Date and Time of Test 3/10/2022 10:47:00 AM
Minutes of Flow 2
Pipe Size (Inches) 8
Pressure Hydrant 13388
Static Pressure (psi) 95
Residual Pressure (psi) 84.5
❑ Q20 Looped
❑ Q20 Multiple Inline Hydrants
Q20 Single Flow
O Sprinkler Test Single Flow
Flow Hydrant #1
13389 Pitot Pressure #1 (psi)
24.4 Yellow 1 ❑O
Test Flow 1 822
Flow Hydrant #2
Pitot Pressure #2 (psi)
Yellow 2
Test Flow 2 0
Flow Hydrant #3
Pitot Pressure #3 (psi)
Yellow 3
Test Flow 3 0
Total Estimated Flow (gpm) 822
AWWA Q20 Calculation (gpm) 2376
(No value in Q20 indicates insufficient pressure drop for Q20 OR a sole sprinkler test.)
Comments
Hydrants opened all the way.
For method of calculating pilot flow with a red Pollard diffuser: see eq. 13, Wa lski and Lutes article 199D Journal Management and
Operations AW WA. For yellow Pollard diffusers, a best fit third order polynomial equation of the Pollard flow vs. pitot pressure gauge is
used.
Estimated Consumption (gal) 1644
For use for water audit
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