This should not really be a problem in that every Backflow Prevention Assembly and Backflow device is already required to be flowed ANNUALLY at the system demand including hose streams (12.6.2.1 and 16.6.2.2 in the 2002 version). People should already be figuring out how to do that including measuring the flow, with the exceptions allowed.
How about suggesting a revision to that proposal to allow water supply testing through the system at least to the system demand such that the pressure can be compared back to the base of the riser (or whatever calculation point is used)? This will provide yearly confirmation that the system is providing the required flow at the required pressure. Sure sounds like something that every insurance company would like to see recorded, including the contractors, what a better way to reduce your potential liability. Just put a hose monster on the system and develop several points to get a develop the supply curve. The curve would end at system demand (or slightly above) and hopefully the tested pressure is (well) above the required pressure. Michael M. Fitz, P.E., C.F.I. MDE Inc. 700 S. Industrial Way Seattle, WA 98108 www.MDE.com 206-321-1804 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of David de Vries Sent: Thursday, September 03, 2009 9:07 PM To: [email protected] Subject: NFPA 25 Proposed Routine Water Supply Testing There is a proposal in NFPA 25 to require water supply testing for sprinkler systems every 5 years. No trigger, like new, high-demand construction in the area or deterioration in the main drain test results -- just every 5 years run the test. This passed the committee on a vote of 24 to 5. Anybody out there doing water supply testing for existing systems when there is no indication of a deteriorated supply? Any owners asking for it? Sorry for the late heads-up. Comments on this, and all the rest of the 205 proposals, are due to NFPA by 5:00 p.m. EDT Friday. I will be up early to prep some comments myself. Dave David A. de Vries, P.E., CSP Firetech Engineering Incorporated --- _______________________________________________ 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) __________ Information from ESET Smart Security, version of virus signature database 4392 (20090903) __________ The message was checked by ESET Smart Security. http://www.eset.com __________ Information from ESET Smart Security, version of virus signature database 4392 (20090903) __________ The message was checked by ESET Smart Security. http://www.eset.com _______________________________________________ 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)
