Air is a lot easier to clean up in the case of a blow-out. "Although I do know some fitters will put 20-30psi of air on the system to make sure it's holding before they fill with water. Of course I asked what good knowing it was leaking did them if they couldn't see air leaks and most likely could hear them either. Yeah, well ummmmmm..... ya see...."
In response to the original question, my main concern would be the possibility of burn-through of air-filled cpvc pipe. Especially if the attic is not sprinklered. Won't the air accumulate at the highest points of the system? We are not talking about air pockets, we are talking about the entire volume of the system compressed to the top. If that does not alarm anyone, it should at least send a trouble signal..... Thomas _______________________________________________ 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)
