I've trying to plumb up a shower valve and can not get the threaded fitting from the cpvc to the brass valve to not drip. I've redone it 3 times now. I have done some other plumbing projects, some copper, some cpvc, and a good amount of pvc, and never really had any issues. This one is kicking my butt.
First time both the hot and cold supply dripped at the threaded fitting. I redid it with more teflon tape(I'm using tape only...have never tried dope), then second time the cold was good and the hot supply dripped at the same spot but slower. I did that side a 3rd time with even more tape(we're talking about ~7 wraps now) and I think it's still leaking. It seemed dry at first but after about 1-2 hours I went back and there was a little water there, although not enough to form a drip. I wiped it all dry and will see if it comes back.
I'm at a loss....
Here's pics of what I"m dealing with. I'm also using the preferred composite fittings(not all plastic)