I do remember the ones with the rods in the center of the valve being particularly poor.
Dwight ________________________________ From: Ron Greenman <[email protected]> To: [email protected] Sent: Tuesday, July 23, 2013 11:25 PM Subject: Re: SIGN for Backflow Prevention Assembly Forward Flow Test By the mid-nineties you have the early Ames models purpose built for sprinklers readily available, but many units being installed are still not listed for fire service as many jurisdictions don't consider the fire line a fire line until after the backflow, and a n on-listed device is cheaper than a listed one. Plus many go back to the seventies and many used weights instead of springs and complicated lever systems for joining the clappers and weights. Wish I could post a picture. On Tue, Jul 23, 2013 at 7:33 PM, Dwight Havens <[email protected]>wrote: > Give me a time frame. My best recollection is the mid '90's. > > Dwight > > > > > ________________________________ > From: Ron Greenman <[email protected]> > To: [email protected] > Sent: Tuesday, July 23, 2013 9:12 PM > Subject: Re: SIGN for Backflow Prevention Assembly Forward Flow Test > > > Were these the plumbing type before fire service listed devices existed. > > > On Tue, Jul 23, 2013 at 4:32 PM, Dwight Havens <[email protected] > >wrote: > > > Yes, yes, and yes. The original proposal was based on observed failures > > of BFPAs to operate properly during main drain testing. > > > > Glendale, AZ public library specifically comes to mind. > > > > Dwight > > > > > > > > > > ________________________________ > > From: Todd Williams <[email protected]> > > To: "[email protected]" < > > [email protected]> > > Sent: Monday, July 22, 2013 9:32 PM > > Subject: Re: SIGN for Backflow Prevention Assembly Forward Flow Test > > > > > > Has there ever been an instance of system failure due to the backflow not > > properly opening? How about detection of a BFP problem during a full flow > > test. How about something subsequent to the initial acceptance? > > > > Todd G Williams, PE > > Fire Protection Design/Consulting > > Stonington, CT > > 860-535-2080 > > www.fpdc.com > > > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > > > > > -- > Ron Greenman > Instructor > Fire Protection Engineering Technology > Bates Technical College > 1101 So. Yakima Ave. > Tacoma, WA 98405 > > [email protected] > > http://www.bates.ctc.edu/fireprotection/ > > 253.680.7346 > 253.576.9700 (cell) > > Member: > ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC, WFSC > > They are happy men whose natures sort with their vocations. -Francis Bacon, > essayist, philosopher, and statesman (1561-1626) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > -- Ron Greenman Instructor Fire Protection Engineering Technology Bates Technical College 1101 So. Yakima Ave. Tacoma, WA 98405 [email protected] http://www.bates.ctc.edu/fireprotection/ 253.680.7346 253.576.9700 (cell) Member: ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC, WFSC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
