That's normally what we do, but we are dealing with this inspector at this borough so we have to make him happy.
Richard L. Mote Rowe Sprinkler Systems, Inc. 7994 Route 522, Suite 1 PO Box 407 Middleburg, PA 17842 P 570-837-7647 F 570-837-6335 -----Original Message----- From: sprinklerforum-boun...@lists.firesprinkler.org [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Hinson, Ryan Sent: Tuesday, February 25, 2014 2:17 PM To: sprinklerforum@lists.firesprinkler.org Subject: RE: Air Testing CPVC Piping Check the forecast and do it when the ambient temp remains constant...like the climate (good luck with that). Don't forget your common gas law, P1V1/T1 = P2V2/T2 if the pressure drops as it may be fun trying to prove the entire pressure drop was due to the inverse relationship to a temperature drop instead of a potential leak or leaks. I don't know about you, but I don't think CPVC is quite to the level of 'rigid' either. Sounds like a better idea to test wet after building is buttoned up and let the chips fall where they may. Ryan Hinson Burns & McDonnell Direct: 952-656-3662 -----Original Message----- From: sprinklerforum-boun...@lists.firesprinkler.org [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Richard Mote Sent: Tuesday, February 25, 2014 12:45 PM To: sprinklerforum@lists.firesprinkler.org Subject: RE: Air Testing CPVC Piping The inspector wants to see an air test we give him an air test within reason. 23° at job site were not putting water in the system under any condition. Richard L. Mote Rowe Sprinkler Systems, Inc. 7994 Route 522, Suite 1 PO Box 407 Middleburg, PA 17842 P 570-837-7647 F 570-837-6335 -----Original Message----- From: sprinklerforum-boun...@lists.firesprinkler.org [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Cahill, Christopher Sent: Tuesday, February 25, 2014 1:32 PM To: sprinklerforum@lists.firesprinkler.org Subject: RE: Air Testing CPVC Piping I fail to see the connection between closing walls and doing a hydro test or substitute air test. Closing the walls is about is the pipe installed, hangars right, size right..... Yep it's all there, close it up and test later. Nothing I know of that requires exposed testing. If it leaks as an inspector I don't care if your floors or walls get wet. I only care the gauge stays at 200 psi for two hours. As an inspector I don't care if it's hard to find said leaks after covering up. When the gauge says 200 for two hours you get you approval. At what point in the project is irrelevant. Even in a dry system we air test (because we have to) and that one week in July when it's above freezing here we go back and hydro the systems. Now as a contractor I surely would love to test everything before things are closed up but sometimes you just can't. Chris Cahill, PE* Associate Fire Protection Engineer Burns & McDonnell 8201 Norman Center Drive Bloomington, MN 55437 Phone: 952.656.3652 Fax: 952.229.2923 ccah...@burnsmcd.com www.burnsmcd.com Proud to be one of FORTUNE's 100 Best Companies to Work For *Registered in: MN -----Original Message----- From: sprinklerforum-boun...@lists.firesprinkler.org [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Richard Mote Sent: Tuesday, February 25, 2014 11:46 AM To: sprinklerforum@lists.firesprinkler.org Subject: Air Testing CPVC Piping We have an AHJ requiring a 50 psi test on CPVC piping, we think that is excessive, and have always used 20 psi max. I know the best practice is to do a hydrostatic test, but thanks to the polar vortex we are having freezing temperatures and the builder needs to close up his walls. Right now we are looking for chapter and verse as to what the maximum recommended pressure is for an air test. Have looked through 3 different CPVC installation handbooks but the number is not jumping out at me. The TYCO Residential Dry System runs 10 - 15 psi pressure. Note: This is not a residential dry system we are trying to air test a system so the drywall can go on. When the building gets the heat turned on it will be a wet system. Richard L. Mote Rowe Sprinkler Systems, Inc. 7994 Route 522, Suite 1 PO Box 407 Middleburg, PA 17842 P 570-837-7647 F 570-837-6335 _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
