I have a half inch cold water copper line connected to a half inch PVC
pipe with the threaded (male) pvc adapter...about after a couple of
months it will start to drip. I use white teflon tape but it seems to
over time loosen in some way...As you know you can only snug these
fittings so tight without cracking the PVC.....but I repair it, and its
damn hard to get to too..and about 2 months later the wood around it
shows me its dripping...I have fixed it 3 times so far and today I am
repairing again..I am almost at a point of teearing out all the PVC in
that line and doing straight copper.

Any suggestions..BTW: I jsut had another copper to PVC with the same
issue but it was simple to get to and repair...

Elliot,

There are transition fittings that are made from brass, so that you
can screw brass threads into the copper adapter and then glue the CPVC
into the other end. Maybe it'd be a good idea to run the copper at
least far enough where the new connection will be in a more available
place.