Its never been a 'new' method for me for 30+ years. Sending full discharge pressure through a normally empty pipe and several thin gate valves is foolish imho. I very often get same pitot pressures with hose monsters on same length hoses or right on the header. When you have them spread out or in catch basins it gets different. I can't speak for old fashioned playpipes and a handheld pitot, been 20 years for that.
From: Sprinklerforum [mailto:[email protected]] On Behalf Of Mike Hairfield Sent: Thursday, March 29, 2018 2:41 PM To: [email protected] Subject: Re: Playpipe Pitot Pressures - Fire Pump Annual Tests I've done them that way but the new method is to throttle the control valve supplying the test header. Mike _____ From: Sprinklerforum <[email protected] <mailto:[email protected]> > on behalf of Mike B Morey <[email protected] <mailto:[email protected]> > Sent: Thursday, March 29, 2018 2:36 PM To: [email protected] <mailto:[email protected]> Subject: RE: Playpipe Pitot Pressures - Fire Pump Annual Tests 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] <mailto:[email protected]> From: John Denhardt <[email protected] <mailto:[email protected]> > To: "[email protected] <mailto:[email protected]> " <[email protected] <mailto:[email protected]> > Date: 03/29/2018 02:33 PM Subject: RE: Playpipe Pitot Pressures - Fire Pump Annual Tests Sent by: "Sprinklerforum" <[email protected] <mailto:[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] <mailto:[email protected]> > On Behalf Of Hinson, Ryan Sent: Thursday, March 29, 2018 2:23 PM To: [email protected] <mailto:[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 <mailto:[email protected]> [email protected] \ <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.burnsmcd.com_&d=DwM GaQ&c=GKdB6-XpYq_0W-WluyVHtw&r=z4t2hrRBa-JsS06T4X_uuYOSJoclVWgSRO8Nq6TDdsg&m =gozQSwBE6iCIWS8o6vYQOb4n1Mwknc0RnIoPuciAek0&s=lMQJrQGNVZ5ZQPnZLfkICBkkVdgHT UvBYNcWVmBpq-U&e=> 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 < <mailto:[email protected]> [email protected]> On Behalf Of Tom Wellen Sent: Thursday, March 29, 2018 1:15 PM To: <mailto:[email protected]> [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] <mailto:[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-Wl uyVHtw&r=z4t2hrRBa-JsS06T4X_uuYOSJoclVWgSRO8Nq6TDdsg&m=gozQSwBE6iCIWS8o6vYQO b4n1Mwknc0RnIoPuciAek0&s=io5GDHP2CC3Rj93U-SIn7fZeaPqMxaCVkd8gSMgxsMs&e=> https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.firesprinkler.org_ listinfo.cgi_sprinklerforum-2Dfiresprinkler.org&d=DwICAg&c=GKdB6-XpYq_0W-Wlu yVHtw&r=z4t2hrRBa-JsS06T4X_uuYOSJoclVWgSRO8Nq6TDdsg&m=gozQSwBE6iCIWS8o6vYQOb 4n1Mwknc0RnIoPuciAek0&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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