It's been a while since I installed a HW tank, and this one is a little worrisome. It's below an old home in some sort of cellar. It's been leaking for about a month and has no shutoff valves of any kind. So it's like working in a very wet and muddy cave, and there's no light except what comes in from the one door.
All the fittings are corroded away to nothing, so I have to do a lot of extra plumbing. For the cold side, I'm thinking of cutting off the bad tee in the main line, which I believe is 3/4" PVC. I can use a compression tee or a cemented-in tee, and then use a CPVC adapter. I'll then install an in-line CPVC ball valve and some more CPVC and finally connect up to the 24" flex copper, which I'll connect to the new water tank.
For the hot side, I'm thinking of cutting off the bad el and cementing in a new el with a CPVC adapter and use a straight piece of CPVC to the flex copper.
Questions: Which is better, the compression tee or the cement-in tee? How long do I have to wait for the CPVC joints to set up before pressurizing the system? Is it necessary to have a ball valve on the hot side as well? The CPVC ball valves are only rated to 180 degrees.
Any other suggestions?