I've got several hot wells, grouped into 2, 3 and 4 wells that have 5/8" copper drains. The drains for each group of wells are manifolded together where each well has its own valve in order to drain the water when the well needs emptied at the end of the day. Over the years, for one reason or another, the drains have been "repaired", which means they aren't draining like they need to and, in some cases, the valves are leaking.

I'd like to re-pipe the drains and change valves as needed, but the area under the wells is not really conducive to cutting, fitting copper and soldering. So, I'd like to do everything in CPVC. I think CPVC is rated at 180°F at 100 PSI, but since they are drains, there is no pressure on the pipe and fittings.

Do you see any issues using CPVC and fittings for the drains instead of copper?