For what's its worth, I have performed air tests in the past on CPVC systems. A few times with more air pressure than I'd like to admit here. It usually does not help locate any unglued joints. I've witnessed tests with where it held air pressure for an hour, but at 20lbs of water, the unglued joint came apart.
Side note: Don't dry fit! Steven Cook TG Gallagher Sprinkler Operations Manager Sent from my iPhone On Feb 25, 2014, at 12:50 PM, "Richard Mote" <[email protected]<mailto:[email protected]>> wrote: 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]<mailto:[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
