Water heater low point drain leak

[Lonestar]

CPVC is rated to 200F service.

You are correct, but the folks at the manufacturing facility I spoke with said this rating is for cemented pipe/fittings, not *threaded*.

What got me started on this research was when I bought a threaded 1/2" CPVC fitting at Lowes. I got home and noticed on the package that it stated "for cold water use only". I too thought all CPVC was rated for 200F at about 150 psi.

I don't doubt that it will work even in the threaded fittings, but I was just posting this as an FYI.

By the way, I ended up with an aluminum pipe nipple to isolate the brass check valve. Again, I'm sure this is over-kill.