Have a look at AWWA Manual M17 - Installation, Field Testing, and Maintenance of Fire Hydrants. A couple municipalities in the metro area require all flow tests comply with M17; whether it be a flow test for hydraulic calculations or testing a hydrant as required by NFPA 25. I believe M17 only addresses two hydrant tests, never a single.
Bobby McCullough Atlanta Sprinkler Inspection [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Paul Pinigis Sent: Tuesday, June 23, 2009 3:33 PM To: [email protected] Subject: RE: Hydrant Flow test results Any single-hydrant test is questionable to begin with, but if two tests are done they should yield identical graphs. Pitot pressures of less than 10 psi are generally unacceptable. Paul Pinigis, P.E. Life Safety Department Head -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Richard Lindner Sent: Tuesday, June 23, 2009 3:25 PM To: sprinklerforum Subject: Hydrant Flow test results Have a question regarding hydrant flow tests. We have received a report where the contractor flow a single 2 1/2" outlet and gave us static, residual, pitot and calculated flow. He then performed another test using the 4 1/2" outlet on the hydrant, again giving us values. Plotting the graph, is there supposed to be a correlation between the testing of the 2 1/2" versus the 4 1/2" or are they supposed to be used separately. For example, when graphing the 2 1/2" outlet, the 4 1/2" outlet info should be hitting this line or not?? Also, is a pitot reading of a range of 4 to say 8 on a 4 1/2" outlet valid data? We're not sure how to use this info. Richard _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
