Then the answer to your original question, in my opinion, is yes, you must re-engineer. Not only is the pipe not the same size, but the hangers are different as well. With CPVC being in a freezing environment, the temps in the attic normally vary. This means required expansion loops in the system for long runs. Especially if AF is involved. I cannot see a "like for like" at any level. I also agree with Mark that you should find the problem first. It may not be what you think. Replacing the system might turn into treating the symptom, not the problem.
R/ Matt On Mon, Aug 11, 2014 at 9:03 AM, Douglas Hicks <[email protected]> wrote: > > The customer wants the copper replaced with CPVC > > > -----Original Message----- From: Duane Johnson > Sent: Monday, August 11, 2014 5:17 AM > To: [email protected] > Subject: RE: copper pipe vs CPVC > > Your statement earlier holds true only if portions of the system are being > replaced. I was under the assumption the entire system was being replaced, > in which increasing diameter will not be more demanding. > > And yes, there is more to calcs... > > Duane > > -----Original Message----- > From: Sprinklerforum [mailto:[email protected]. > org] On Behalf Of Matthew Willis > Sent: Monday, August 11, 2014 7:32 AM > To: [email protected] > Subject: RE: copper pipe vs CPVC > > There is more to a calc than just pressure. Flow is also part. Why do you > think we are required to pick the sprinkler closer to the main on a tree > calc? > R/ > Matt > On Aug 11, 2014 7:23 AM, "Duane Johnson" <[email protected]> > wrote: > > No, no, no. As long as you are increasing the ID along the primary >> path, you are not making the calc more demanding. Increasing the ID >> reduces the friction loss per ft. and reduces the overall required >> pressure of the system. >> >> Duane >> >> > _______________________________________________ > 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
