Black steel is non-potable and per the plumbing code, AWWA standards and USC (gods of all things backflow) requires backflow protection. By the same gods sprinkler systems, regardless of potable piping or not, except flow through types, require backflow protection. This means approved devices--not home made ones. I'll refrain from editorializing about whether these $%^&*(?#/! rules make any real world sense relative to statistical risk.
On Wed, Oct 21, 2009 at 5:06 AM, George Church <[email protected]> wrote: > I can see where black steel pipe in the basement might be less than > desirable if connected to the rest of the plumbing, but a pair of > rubber-seated checks could address that at lower cost, and without the > friction loss of spring-loaded clappers inherent in a BFP. > > As with so many of these requests, the knee-jerk reaction should be: > "Could you show me the regulation so we can be certain we are complying with > it in its entirety?" > > glc > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Todd Williams > Sent: Wednesday, October 21, 2009 6:24 AM > To: [email protected] > Subject: 13D and backflow preventers > > I did a design a couple of years ago for a group home based on NFPA > 13D (2002). We have a single copper feed from the public supply for > both domestic and fire. The basement has steel pipe and the upper > floors have CPVC. Now, the water company is coming back and saying > that a backflow preventer is required on the system because of the > different materials used on the system. Supposedly the State of CT is > requiring it, although I've never heard of it before. Anybody run > into this in other jurisdictions? > > Todd G. Williams, PE > Fire Protection Design/Consulting > Stonington, Connecticut > www.fpdc.com > 860.535.2080 > _______________________________________________ > 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) > -- 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)
