J. I believe you need the loop per 13. The testable backflow device, DCVA or RPBA, would be a health code requirement as administered by the cross connection specialist for the water purveyor. 13 would then allow deletion of the loop but require the expansion tank.
On Tue, Jan 19, 2010 at 6:22 PM, Jay Jay Blocker <[email protected]> wrote: > Using NFPA 13 (2007 thus the reason for my question) I cannot find anything > saying that using a swing check valve at the end of a wet system and > transitioning to a glycol system is allowed. Basically 1 section of a > parking garage is exposed to cold temps when the garage door opens. Door > failed to shut and several freeze breaks happened. The question has been > asked if adding a separate control valve before a single check valve at the > end of the wet system and turning it into antifreeze (without a rpz or a > loop) was an option. I don't see where this is an option by > 7.6 anywhere. I feel like I'm missing something here. Are any of the older > editions of 13 saying this is allowed or am I looking in the wrong spot? > > J. Blocker > EFPS > (303) 353-9712 > > > > _______________________________________________ > 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)
