Most CPVC manufacturers advise against air testing a CPVC piping system since pipe failures usually are very dangerous because of the plastic fragments produced by the pipe failure. There is a lot of energy store in a pipe system being tested with air. The stored energy is capable of causing a fatality due to flying pipe shards.
I would recommend against testing with air. Regards Jim Sent from my Galaxy S®III -------- Original message -------- From: Richard Mote <[email protected]> Date:2014/02/25 13:00 (GMT-05:00) To: [email protected] 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 [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
