Bill, This is a good way to do it. I would suggest two 12" lengths of 2" pipe with caps on one end and a 2 to 1/4" reducer down for a pressure gauge. Fill one half full, fill the other right up to the top, stick them in your fridge for half a day and then thread the gauges in. Be sure and use a gauge you don't care about for the full pipe. %-)
Michael M. Fitz, P.E., C.F.I. MDE Inc. 700 S. Industrial Way Seattle, WA 98108 www.MDE.com 206-321-1804 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Friday, March 20, 2009 2:42 PM To: [email protected] Subject: RE: Excessive system pressure Rodney, You said you aren't hard headed and you understand the principles behind the system pressure increases. Here's a chance to prove both. 1. Two containers of identical volume. One container 50% water, the other container 100% water. Each has been sitting in a 50 F room with the lid off. In other words the liquid and the containers are at 50F. Now make sure the 100% container is topped off and put lids on both. Read the pressure gage and satisfy yourself they both read "0". Move both containers into a 120 F room and come back when the two systems reach 120 F. 2. Same as above, but remove 10% of the water from the filled container before capping and moving. When the systems reach 120 F, which container has the higher pressure in each of the cases above? Bill Brooks William N. Brooks, P.E. Brooks Fire Protection Engineering Inc. 372 Wilett Drive Severna Park, MD 21146 410-544-3620 Phone 410-544-3032 FAX 412-400-6528 Cell _______________________________________________ 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) __________ Information from ESET Smart Security, version of virus signature database 3952 (20090320) __________ The message was checked by ESET Smart Security. http://www.eset.com __________ Information from ESET Smart Security, version of virus signature database 3952 (20090320) __________ The message was checked by ESET Smart Security. http://www.eset.com _______________________________________________ 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)
