Ed, 2006 IPC 608.16.4.1 Additives or nonpotable source.
Where systems under continuous pressure contain chemical additives or antifreeze, or where systems are connected to a nonpotable secondary water supply, the potable water supply shall be protected against backflow by a reduced pressure principle backflow preventer. Where chemical additives or antifreeze are added to only a portion of an automatic fire sprinkler or standpipe system, the reduced pressure principle backflow preventer shall be permitted to be located so as to isolate that portion of the system. Where systems are not under continuous pressure, the potable water supply shall be protected against backflow by an air gap or a pipe applied atmospheric vacuum breaker conforming to ASSE 1001 or CSA B64.1.1. I don't see any exceptions?? Hope this helps. Reed A. Roisum, CET Fire Protection Ulteig Engineers, Inc. 3350 38th Avenue S. Fargo, ND 58104 701.280.8580 direct 701.212.8810 cell www.ulteig.com Energy | Water | Built-Environment CONFIDENTIAL COMMUNICATION: Emails from this company normally contain confidential and privileged material, and are for the sole use of the intended recipient. Use or distribution by an unintended recipient is prohibited, and may be a violation of law. If you believe that you received this in error, please do not read the body of this e-mail and please inform the sender that you have deleted the e-mail and any copies. Thank you. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Ed Kramer Sent: Thursday, March 11, 2010 10:23 AM To: [email protected] Subject: Backflow protection on antifreeze system Anybody have a 2006 International Plumbing Code handy? I have a client who wants to use glycerine in a small antifreeze system. Nothing unusual about that. But he claims that by using food-grade glycerine he doesn't need an RP BFP and the associated expansion tank. I disagree, but don't have code references to back it up. The 2006 IPC is applicable. Thanks in advance! Ed Kramer Kramer Design, LLC Littleton, CO _______________________________________________ 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)
