Mike: A couple of things jump right to mind. 1. What is the purveyors backflow policy? (If they require RPZ protection on all Fire Sprinkler systems with anything but water, you'll end up replacing your double check with an RPZ.) (If they only require protection for non-water additatives, you install an RPZ for the AF heads.) 2. Does the Purveyor own the DCBFP? (Most water authorities require protection of their water supply, but it is the owners responsibility to provide that protection. The owner owns maintains and services the backflow, to protect the water system of the purveyor.)(If you install a RPZ for the AF heads off the existing Main, you've met all requirements of the Safe Drinking Water act 1974, and national primary drinking water regulations.) 3. Dose you water authority, have an "Installation Standard" or "Installation Guidelines" or "Standard for Backflow Prevention", or a formal "Backflow Policy"? (I'd read these all very carefully, and if it doesn't match what your being told, somebody is making it up as they go, and needs to be stopped.) (Or as Geo. Would say "Just Say NO!")
Thom McMahon, SET Firetech, Inc. 2560 Copper Ridge Dr P.O. Box 882136 Steamboat Springs, CO 80488 Tel: 970-879-7952 Fax: 970-879-7926 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mike Wisneski Sent: Wednesday, July 02, 2008 6:21 AM To: [email protected] Subject: RE: Backflow device and steel pipe Well forumites, I've gat a new one (to me). Customer wants a small anti-freeze system on a loading dock. The existing system is a steel pipe system with a double check backflow at the service entry. Normally I would just tap into the closest main (5 feet away), drop down to a reduced pressure backflow and install an expansion tank and the eight head anti-freeze system. The water purveyor now tells me that is unacceptable. They want the anti-freeze system tied into the ductile iron pipe at the service entrance, before the existing double check, and fed with non ferrous pipe. They say they do not want any type of backflow device fed with black steel pipe. This, I believe, is not a code issue. Has anyone run into this situation before? Thanks in advance, Mike Wisneski _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
