We had a job once where the GC, because of lack of hydrants, suggested putting a guage on the hosebib and flushing a couple of toilets to get a residual pressure, LOL! No, we didn't do it that way but it was pretty funny.
On Wed, Apr 6, 2011 at 8:10 AM, George Church <[email protected]> wrote: > 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) > _______________________________________________ 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)
