Might you need to crack another hose bib to open the domestic BFP? Otherwise you're reading the pressure trapped in the house past the check/bfp and you'll have a great, flat strong (inaccurate) curve.
:) One of my favorite moments was conducting a verifying flow test at the Centre Daily Times with a fresh new FM engineer, 1985+/-. I watched him remove the new CSC gauge on our new ALV and install the FM test gauge. He stepped back and looked at it when he was done, then started to go outside to flow a hydrant. I stayed where I was, he looked back, and I pointed and asked "won't we get more pressure drop if we put your gauge BELOW the clapper?" We all have to start somewhere....might have been more fun to see if he noticed the flat curve and troubleshot it himself, but didn't have the time. George Church Rowe Sprinkler Systems, Inc. PO Box 407, Middleburg, PA 17842 877-324-ROWE 570-837-6335 fax [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Todd Williams Sent: Wednesday, April 06, 2011 10:54 AM To: [email protected] Subject: RE: Flow Test I have actually yet to find a situation where there is not some other source the take a pressure reading. I have used a silcock connection on the side of a house before. I'd trust that more then a single hydrant test At 10:34 AM 4/6/2011, you wrote: >When we're in a pinch, we will use a one-hydrant test. We'll put a Hose >Monster on the end of a 10 ft. hose attached to the hydrant. Take our static >pressure with the hose disconnected. Then attach the hose, flow it and get our >pitot off the Hose Monster, and the residual from the other ear of the >hydrant. Then we disconnect the hose and take another static reading just to >be certain. This method produces somewhat conservative results, depending on >how much flow you have. The more flow, the more losses are being deducted in >the residual reading due to friction in the hydrant barrel. > >Again, not ideal, but we often face non-ideal situations. I'd take these >results over a computer model simulation of the flow. > >Mark A. Sornsin, PE| Fire Protection Engineer Ulteig Engineers, Inc.| >Fargo, ND [email protected] > > > >-----Original Message----- >From: [email protected] >[mailto:[email protected]] On Behalf Of Brad >Casterline >Sent: Wednesday, April 06, 2011 9:18 AM >To: [email protected] >Subject: RE: Flow Test > >I just want to add to Mike's and Lamar's posts (for the Sprink seriously in >need of getting a life)- look at FIGURE A.8.16.2.4 Unacceptable Pressure Gauge >Location. I belive this is similar to a single hydrant flow test. Like Lamar >said, it is slightly less than two hydrant flow. The reason is that more of >the potential goes into kinetic energy, because the velociity where the gage >is NORMAL is higher. > >-----Original Message----- >From: Brian Harris [mailto:[email protected]] >Sent: Wednesday, April 06, 2011 8:50 AM >To: [email protected] >Subject: Flow Test > >I swear I once read that a single hydrant flow test was acceptable, maybe in >limited instances, but I can't seem to find anything on it. Any ideas? > > > >Brian Harris > >First Defense Fire Protection > >11957 Ramah Church Road > >Huntersville, NC 28078 > >Phone: 704.948.3506 > >Fax: 704.948.3507 > >Nicet # 128476 > > > > > > > >======= >Email scanned by PC Tools - No viruses or spyware found. >(Email Guard: 7.0.0.21, Virus/Spyware Database: 6.17210) >http://www.pctools.com/ ======= >_______________________________________________ >Sprinklerforum mailing list >[email protected] >http://fireball.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 >[email protected] >http://fireball.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 >[email protected] >http://fireball.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) Todd G. Williams, PE Fire Protection Design/Consulting Stonington, CT 860.535.2080 www.fpdc.com _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.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 [email protected] http://fireball.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)
