When you are talking about homes of this value,why are they even considering anti-freeze ? It's not like they can't afford a dry pipe system.Just a thought.
Lamar V. ---- Jim Johnston <[email protected]> wrote: > This is a bad idea, pressure relief in lieu of expansion tank? We have a > community north of us that have weekend getaway homes that are all > sprinklered including the garages and outside canopies where any fuel fired > devices are. A lot of these homes are done with antifreeze this in December > this area had 2 weeks of single digits to -10, some of the antifreeze > systems froze. One contractor installed expansion tanks with pressure > relief - they froze. The relief valve did what is was supposed to, however > it introduced water into the systems and diluted the mixture. The low end > of these homes are $1,000,000 the high end is $10,000,000+, problems like > these just add fuel to the fire for our home builder opponents. > > Jim Johnston, P.E. > Fire Protection Engineer > Inland Fire Protection, Inc > 1100 Ahtanum Road > Yakima, WA 98903 > Phone 509-248-4471 > Fax 509-248-1180 > [email protected] > > -----Original Message----- > From: Thom McMahon [mailto:[email protected]] > Sent: Thursday, January 21, 2010 7:56 AM > To: [email protected] > Subject: RE: Antifreeze Backflow Prevention > > 2010 NFPA 13 allows the use of a "Pressure Relief valve in lieu of an > expansion tank. (I guess the committee got tired of waiting for the price of > those expensive expansion tanks to come down, and came up with an > alternative.) But if you read 7.6.3.5 carefully all three conditions must be > met. Pump, relief and make up. > > 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 Ron Greenman > Sent: Tuesday, January 19, 2010 8:34 PM > To: [email protected] > Subject: Re: Antifreeze Backflow Prevention > > but require the expansion tank. > > eld) > > _______________________________________________ > 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) _______________________________________________ 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)
