Per NFPA 13 2010 7.6.3.4 a listed 1/2' RELIEF VALVE shall be permitted in lieu of an expansion chamber required in 7.6.3.3 provided antifreeze volume does not exceed 40 Gallons, see figure 7.6.3.4
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 Chris Cahill Sent: Thursday, February 11, 2010 1:08 PM To: [email protected] Subject: AF Expansion Tanks Anyone got a source for correct ones that aren't so expensive. 100 psi 5 gal about $70 (plumbers version). 2.5 gal from Firetrol(?) or Youngs in the $600+ range. Is this what you've been doing on AF systems? My supplier tells me they sell a lot of the plumber's versions and almost none of the correct ones. And yet I don't hear of problems. Could be my hearing, could be no problems. Chris Cahill, P.E. Fire Protection Engineer Sentry Fire Protection, Inc. 763-658-4483 763-658-4921 fax Email: [email protected] Mail: P.O. Box 69 Waverly, MN 55390 Location: 4439 Hwy 12 SW Waverly, MN 55390 _______________________________________________ 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) _______________________________________________ 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)
