Very good background information. I'm electing to follow your guidance. It lost me a nice retrofit job but I'd rather not take it and chance a 5-6 hour cure for 150 PSI than throw the dice. It's got me thinking of maybe making some changes on plastic work we have currently and future. I think that maybe on a large condo job it might make sense to install metallic breaks in the branches to the units, threaded or grooved. That way if a unit was retrofitted, a new system could be installed in parallel and after 24 hrs, switched over. Just a thought.. TD
The real world we work in is different than doing testing at UL with perfect conditions including controlled humidity, temperature and perfectly saw cut pipe pushed and held at pipe stop. To prove our point to ourselves we went out in the field and cut out VPVC fittings that had been installed with system in operation for a period of time and found that even though many joints were not perfect they held with no problem because they had time to cure. We did have a CPVC summit with all the manufacturers and a number of contractors participating to review installation guidelines. CURE TIME WAS on the list for new testing. Spears changed their guidelines to 24 hour minimum and Blazemaster is still committed to do the testing. The good news is that the acceptance of 24 hour minimum CURE TIME has dramatically reduced these losses. RelMark appreciates all of your comments and if you need any additional information or have questions please call. Top Myers _______________________________________________ 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)
