I have read 11.2.2 and 11.2.2.8.2, and my first comment is that this only applies to "Pipe Sch." Systems. If your reference was to Fig. 11.2.2.1, again this is only for pipe sch. Systems, and LH MINIMUM!!! Of 15PSI residual, would not relieve you from a MFG. installation guide that requires 20PSI minimum.
Aren't we talking about "ALL" systems with backflow preventers installed? Not just PSS's? You'll also note that even pipe sch. Are limited to construction type from using Fig. 11.2.2.1 in 11.2.2.9. So let's get back to all BFP installations. 1) If you don't install to MFG. instructions your SOL 2) If you don't install to Listing your SOL 3) If you overflow the device, it could result in failure, permanent damage or a legally untenable position. 4) If you don't meet NFPA13, 25, 24, ASSE, MFG., listing agency or water purveyor requirements, again your SOL Just as 13 is a minimum, fig. 11.2.2.1 won't help if you've got a Hydraulically designed system, or any of the above apply. What I've been trying unsuccessfully to say is that there is no single requirement, AHJ, or source for the installation or testing of BFP devices. You've got to sort through all the requirements from everyone that has a stamp, claim or authority over that device, and then find what will satisfy all of them. 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----- Timothy W Goins Read carefully NFPA 13 2007 Chapter 11.2.2 and especially as modified with Chapter 11.2.2.8.2 _______________________________________________ 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)
