My experience has always been that the valves on the test header are throttled to match them all up as well. Eliminates a lot of math and record keeping concerns and makes it easy to be sure the fitters hit the right GPM points.
Mike Morey CFPS 3229 • NICET S.E.T. 123677 Project Manager • Fire Protection Group Shambaugh & Son, LP an EMCOR Company 7614 Opportunity Drive • Fort Wayne, IN • 46825 direct 260.487.7824 / cell 260.417.0625 / fax 260.487.7991 email [email protected] From: John Denhardt <[email protected]> To: "[email protected]" <[email protected]> Date: 03/29/2018 02:33 PM Subject: RE: Playpipe Pitot Pressures - Fire Pump Annual Tests Sent by: "Sprinklerforum" <[email protected]> BE ADVISED - This email originated outside EMCOR. We adjust the test header valves to obtain identical pressure (of course with-in gauge accuracy). It helps to use calibrated pressure gauges of the correct range to produce pressure readings near the mid-span. John From: Sprinklerforum <[email protected]> On Behalf Of Hinson, Ryan Sent: Thursday, March 29, 2018 2:23 PM To: [email protected] Subject: RE: Playpipe Pitot Pressures - Fire Pump Annual Tests I’ve never seen them all identical. Ryan L. Hinson, PE*, SET** \ Burns & McDonnell Senior Fire Protection Engineer O 952-656-3662 \ M 320-250-5404 \ F 952-229-2923 [email protected] \ burnsmcd.com 8201 Norman Center Drive, Suite 300 \ Bloomington, MN 55437 *Registered in: LA, MD, MN, PA, TX, & UT **NICET IV - Water-Based Systems Layout From: Sprinklerforum <[email protected]> On Behalf Of Tom Wellen Sent: Thursday, March 29, 2018 1:15 PM To: [email protected] Subject: Playpipe Pitot Pressures - Fire Pump Annual Tests In my insurance days, I seldom had the same pitot pressures from playpipes. The pressures would be the same on several but others would be 1 to 2 psi different. I'm seeing fire pump reports consistently showing all the same pitot pressures for all four to six playpipes. I'm questioning that based on my past experience. Is the same pressures on pitots that common? Tom Wellen _______________________________________________ Sprinklerforum mailing list [email protected] https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.firesprinkler.org_listinfo.cgi_sprinklerforum-2Dfiresprinkler.org&d=DwICAg&c=GKdB6-XpYq_0W-WluyVHtw&r=z4t2hrRBa-JsS06T4X_uuYOSJoclVWgSRO8Nq6TDdsg&m=gozQSwBE6iCIWS8o6vYQOb4n1Mwknc0RnIoPuciAek0&s=io5GDHP2CC3Rj93U-SIn7fZeaPqMxaCVkd8gSMgxsMs&e= This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient.
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