After watching this thread for a week and thinking about all the collateral issues with plastic, my next step would be to go back to the owner and question their motivation for the copper to plastic recommendation. It may on the surface appear cheaper to just change copper to plastic, but properly addressing all the issues associated with plastic may swing the deal back in favor of repairing the leaks in the copper system. How old is the system? Where is it leaking? How many leaks? Is there an obvious cause for the leaks? Questions are cheap. Mark at Aero
Sent from my iPhone > On Aug 10, 2014, at 6:32 AM, "Douglas Hicks" <[email protected]> wrote: > > What damage does glycol do to CPVC? And is the damage visible? Cracks, > pitting or does it fail all at once, leading to extensive water damage? There > is a sign stating the attic has plastic pipe. Can I flush the system with > water several times, and then fill it with glycerin? > > Part of the attic is flat, with insulation batts on top of the plastic pipe. > Those areas can be tented with sheet plastic and the batts layed over the > pipe. Part of the attic has a cathedral ceiling, with the pipe hidden in > the joist spaces, I do not know if it is 2 x 4 or 4 x 6 rafters. I suppose > using spray foam insulation on top of the plastic pipe is a violation of the > listing. Can I use pink or blue solid insulation? > > -----Original Message----- From: Rod DiBona > Sent: Friday, August 08, 2014 12:58 PM > To: [email protected] > Subject: RE: copper pipe vs CPVC > > Better verify it is glycerin > > > Sent from my Verizon Wireless 4G LTE smartphone > > > -------- Original message -------- > From: Douglas Hicks > Date:08/08/2014 2:40 PM (GMT-05:00) > To: [email protected] > Subject: copper pipe vs CPVC > > One of our group homes has leaking copper pipe. The owner told me their > experience is to replace the copper with CPVC. I like that, faster and > easier for us. But, do I need to get the system re-engineered when changing > to CPVC? Can I just replace size for like size? > > The system is 20+ years old so I am going to propose new sprinklers. Besides, > some of the heads are corroded and some have paint on them. > We will also provide a means to test the antifreeze, at present there is no > way to test the solution. > > I am going to exclude sheet rock and painting from the job. > > Douglas Hicks > General Fire Equipment Co of Eastern Oregon, Inc > _______________________________________________ > 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 > _______________________________________________ > 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
