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)
