A couple of comments: 1) I thought that's what Forest said last night, that both the backflow and the sensing line were on the suction side. That's completely whack and I can't picture it either. How the hell did they set the pump (and the jockey for that matter).
2). FYI Ron: I don't know if it's in the UFC's or just NAVFAC practice, but they're requiring the BFP to be on the discharge side of all pumps now. Steve Sent from my Verizon Wireless BlackBerry -----Original Message----- From: "Ron Greenman" <[email protected]> Date: Sat, 5 Dec 2009 10:14:22 To: <[email protected]> Subject: Re: pump sensing line Before the pump, between the backflow and the pump, and not after the pump discharge check? I'm trying to picture what's different than a typical set-up. On Sat, Dec 5, 2009 at 10:09 AM, Forest Wilson <[email protected]> wrote: > 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] > <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 >> <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 > <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 > <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 <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) __________ Information from ESET NOD32 Antivirus, version of virus signature database 4662 (20091205)__________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com <http://www.eset.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)
