I do a lot of this work in NYC and we just use the gravity pressure as the static number and drop 1 psi for residual pressure. Then divide the gravity tank volume by your hazard (i.e. light = 30 minutes, and ord haz = 40 minutes) for the flow number.
Steven From: Sprinklerforum <[email protected]> On Behalf Of Travis Mack, SET, CFPS, CWBSP, RME-G Sent: Wednesday, May 15, 2019 11:31 AM To: [email protected] Subject: RE: Water Test From Storage Tank Computer models do it all the time. [MFP_logo_F]<http://www.mfpdesign.com/> Travis Mack, CFPS, CWBSP, RME-G, SET MFP Design, LLC 3356 E Vallejo Ct Gilbert, AZ 85298 480-505-9271 fax: 866-430-6107 [email protected]<mailto:[email protected]> www.mfpdesign.com<http://www.mfpdesign.com> Send large files to us via: https://www.hightail.com/u/MFPDesign<https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.hightail.com%2Fu%2FMFPDesign&data=02%7C01%7C%7C1121d49f9e6b4cf248f108d4df580e77%7C14e5497c16da42e69ffa77d19bafe511%7C0%7C0%7C636379016677342180&sdata=eGdMZGu2wXhUupGwgGTrqF3b54OP5%2BAZvlHhABSexWY%3D&reserved=0> LinkedIn: https://www.linkedin.com/in/travismack<https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.linkedin.com%2Fin%2Ftravismack&data=02%7C01%7C%7C1121d49f9e6b4cf248f108d4df580e77%7C14e5497c16da42e69ffa77d19bafe511%7C0%7C0%7C636379016677342180&sdata=tT5E7LsZjSmyreKi4gDCa70EWN%2BZodi%2FhbeCbHNRijI%3D&reserved=0> "The bitterness of poor quality remains long after the sweetness of low price is forgotten." From: Sprinklerforum <[email protected]<mailto:[email protected]>> On Behalf Of Mike Stossel Sent: Wednesday, May 15, 2019 8:27 AM To: [email protected]<mailto:[email protected]> Subject: Water Test From Storage Tank I have an existing building with a sprinkler system that is supplied by a gravity tank located on the roof. They are modifying the first floor of the building that will require hydraulic calculations. Is it possible to mathematically create a waterflow test accurately, or do you need to actually perform a water flow test at the 1st floor level? Mike Stossel SET [400dpiLogoCropped] 36 Barren Road East Stroudsburg, PA 18302 Office: 973-670-2627 [email protected]<mailto:[email protected]>
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