The "California" ells and tee's I'm familiar with would go from 1" male thread to either a 1" FM inlet or a 1/2" FM inlet. They differed from a Std. street ell in that they were a longer pattern. I still have a few on the shelf, but I don't think anyone is making them currently. The one's I have came from Central/TYCO about 8 to 10 years ago. Unfortunately what you want is a 3/4" male thread to avoid replacing the existing branch line tee, that then has a 1" FM inlet. This would avoid the 3/4" nipple exclusion is a seismic zone, because there is no 3/4" fitting exclusion.
My thoughts are this is a bit suspect as an approach, to avoid replacing existing branch line tee's. The apparent reason to limit the nipples to 1" is that the forces in a seismic zone are too great for a 3/4" pipe thread to survive. Having said that the 3/4" male thread on a fitting is just as weak or weaker than the thread on a nipple. MY 2 cents Canadian and worth every penny. 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 Allan Seidel Sent: Wednesday, July 29, 2009 10:30 AM To: [email protected] Subject: 8.14.19.4.4 (2002 NFPA 13) and 3/4" x 1" California 90 Ell (90 deg. red. street elbow) Taken literally, 8.14.19.4.4 (2002 NFPA 13) prohibits piping nipples less than 1" when revamping a 3/4" outlet to a 1" drop in seismic areas. The standard does not include fittings in its 8.14.19.4.4 statement. I take it that using a 3/4" x 1" California 90 Ell fitting (90 deg. red. street elbow) to revamp a 3/4" outlet to a 1" drop is permitted in areas subject to earthquakes. Is that why its called a "California" fitting? Allan Seidel St. Louis, MO _______________________________________________ Sprinklerforum mailing list http://lists.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 http://lists.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)
