Bruce, The loop exists on partial wet systems having a portion with anti-freeze, not for to keep it out of the potable system which is a health issue and isn't, nor should it be, addressed by 13, which is a standard for sprinkler installations, but rather to keep the water/anti-freeze solution from migrating into the straight water portions of the system to mitigate against the tendency for the solution to become diluted if not separated in some way, in this case using the loop similarly to a plumbing trap. One of my better Scott Fitzgerald sentences. Or was that Thomas Wolfe or Bill Faulkner that wrote the long sentences?
On Fri, Jan 22, 2010 at 7:56 PM, <[email protected]> wrote: > Jay, > > Would it be allowed in a system supplied by a water supply that was stand > alone, and dedicated for fire protection and/or industrial use only? > > In my city the issue is that all the 13 and 13-R systems are supplied by > municipal water supplies. > > Yours, > > Bruce Verhei > > > ----- Original Message ----- > From: "Jay Jay Blocker" <[email protected]> > To: [email protected] > Sent: Friday, January 22, 2010 5:51:37 PM GMT -08:00 US/Canada Pacific > Subject: Re: Antifreeze Backflow Prevention > > I see every point here but again if im correct there is no situation in which > just putting a single swing check valve at the remote area of a wet system > with no backflow orevention or loop is allowed? > > J. Blocker > EFPS > (303) 353-9712 > > > > > ________________________________ > From: Forest Wilson <[email protected]> > To: [email protected] > Sent: Thu, January 21, 2010 2:24:29 PM > Subject: Re: Antifreeze Backflow Prevention > > Ohio will only allow a ethylene glycol with air gap seperation. > I know that proptlene glycol is non toxic but coming from the field I > have experienced fitters using the ethylerne glycol in sprinkler > systems. Mostly because they are not educated on the hazards. > It is for that reason I agree with Ohio EPA requirement for RPZ on > antifreeze loops. > > Forest Wilson Project Manager Cherokee Fire Protection Co. 1855 > Bellbrook Ave. Ste C > Xenia OH 45385 > ph: 937-376-2333 fx: 614-455-4324 cell: 937-307-5647 . Visit our blog: > www.cherokee-fire.blogspot.com NOTICE: The information contained in > this email is intended to be solely for the use of the named individual > or entity to which it is directed and may contain information that is > privileged or otherwise confidential. It is not intended for > transmission to, or receipt by, anyone other than the named addressee > (or a person authorized to deliver it to the named addressee). It > should not be copied or forwarded to any unauthorized persons. If you > have received this electronic mail transmission in error, please delete > it from your system without copying or forwarding it, and notify the > sender of the error by reply email or by calling Cherokee Fire > Protection Co. at 888-347-3079 toll free. > > > -----Original Message----- > From: Roland Huggins <[email protected]> > To: [email protected] > Sent: Thu, 21 Jan 2010 12:19:04 -0800 > Subject: Re: Antifreeze Backflow Prevention > > bloody RPZ's have that annoying spitting characteristic too. > > As a sidebar, an RPZ is required for protection against toxic > compounds but even non-toxic chemicals (like propylene glycol) get > pushed into using it. SInce an RPZ is for toxic compounds, a cycle or > two ago I attempted to delete the restriction against ethylene glycol > when an RPZ is used. Needless to say, the TC decided not to depend on > the RPZ that strongly. To be honest, I didn't do an extensive review > to see how stringent the IPC is on compounds that actually are toxic > since I knew it would fly like a lead balloon. > > Anyone that plays with systems with nasty compounds that takes water > from a potable supply, feel free to send me an off-Forum email > educating me further. > > Roland > > On Jan 21, 2010, at 11:41 AM, Matt Grise wrote: > >> Sorry...unclear wording. >> >> I meant that you could use either: >> >> 1) an RPZ at the riser, and a drilled check valve at the loop >> 2) a double check bfp at the riser and an RPZ at the loop >> >> We sometimes use the second setup since RPZ's cost so much more than >> DC BFP's. If the primary riser is 4,6,8" and the antifreeze loop >> only needs a 1.25" RPZ, it can be less expensive to use 2 bfp's. >> >> Matt Grisé PE*, LEED AP > > _______________________________________________ > 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) > _______________________________________________ > 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)
