if you were to install sensing line on city side/before the backflow, wouldn't you need another backflow for the sensing line?
Bryan A. Dann Dannba Design Services, LLC Fire Sprinkler Designs Office: (740) 363-5878 Cell: (740) 803-0967 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]]on Behalf Of Forest Wilson Sent: Saturday, December 05, 2009 1:09 PM To: [email protected] Subject: RE: pump sensing line The backflow is installed on the supply side of the pump, city side. The sensing line is installed system side of backflow. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Ron Greenman Sent: Saturday, December 05, 2009 1:00 PM To: [email protected] Subject: Re: pump sensing line I'm surprised that the BFP was allowed on the system side of the pump at all but since the sensing line is for pressure drop in the system having it there (and allowing it as Tom says from the TIAs) makes sense. On Sat, Dec 5, 2009 at 1:24 AM, Tom Duross <[email protected]> wrote: > There was a TIA 2 or 3 editions ago for systems with the BFP on the > discharge of the pump. Between the loss through the BFP checks and the > hammer between the pump chv and the BFP, they allowed for moving it there. > It's correct and moreover better, also OK to combine them from the same > system tap (assuming the JP is also before the BFP). > > Tom > > > I saw a pump recently with the sensing line installed on the system side of > the backflow. > What is the reason for installing on the system, rather than the city side > of the backflow? > Am I correct that it should be on the city side? > > Forest Wilson > > _______________________________________________ > 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) > -- Ron Greenman Instructor Fire Protection Engineering Bates Technical College Tacoma, WA Member: SFPE, ASCET, NFPA, AFSA, NFSA AFAA, WSAFM _______________________________________________ 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)
