Originally Posted by
Joshua Hardesty
Eh, knows Jerry. I can't think of a situation off the top of my head where I'd need to transition from CPVC-FIP to CPVC-MIP, unless I ran out of couplings. heh. The literature says not to be used as a transition from CPVC to metal, so that doesn't exclude cpvc-cpvc (which isn't much of a transition :/ ), but the fitting itself only says COLD WATER ONLY.
Joshua,
"so that doesn't exclude cpvc-cpvc (which isn't much of a transition :/ ), "
Then that fitting would not be a "transition", it would just be an "adapter".
"Adapters" do not have that limitation as they are used for like material to like material, thus the expansion and contraction coefficients would be the same.
Now, the key is, when we see an 'adapter' being used as a 'transistion', we need to know (to remember) to look and make sure it is marked 'Cold water use only', otherwise they are using an "adapter" instead of a "transition" fitting.
Likewise, we need to remember to look at 'adapters' being used as 'adaptors' to make sure they are not "transistions" and are not marked 'Cold water use only'.
In reality, I'm guessing that almost every 'adapter' we see being used is really being used as a "transitionadapterstransitionstransition", which means it is incorrect.
Recently I re-worked my sprinkler system, removing the interior of the indexing zone valve to allow it to serve as a manifold instead of a valve, then installed electrically controlled valves for each zone off the manifold. I used "adapters" as "adapters" from the PVC pipe into the PVC valves, so I actually did it correctly, without knowing that I was. Whew!
