Yes they are sampling ports. "A" in also known as the interface, which is where the water meets the antifreeze. (Should always test as water at this point) "B" should always test as antifreeze. "A" becomes important when systems area higher than "A", because antifreeze is heavier than water, you want to keep it below "A"
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 Loren Johnson Sent: Wednesday, June 18, 2008 8:23 AM To: Sprinkler Forum Subject: ANTIFREEZE PIPING ARRANGEMENT Dear AFSA Forumites: We're designing fire sprinkler protection for a new CVS store and we have a small 2 head antifreeze system to be installed. In looking at Figure 7.6.3.1 in the 2007 edition of NFPA 13, can anyone tell me the purpose of the two valves marked as "A" and "B"? Are they testing and sampling valves, and do they need to be listed for fire protection service as well? Thank you. Loren Johnson The Hitchcock Company Peoria, IL _______________________________________________ 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)
