Leak at threaded pipe joint
Hi, I have a leak inside the wall at my bath tub faucet where the copper pipe meets the faucet. The whole unit was replaced before I bought this house so it is not very old, but it is leaking where the pipes are screwed together. Now my problem is that it is a 3 knob faucet w/shower so I can not actually unscrew the connections to fix them, they are just threaded female ends soldered on to a piece of copper pipe. You can tell they screwed them on first and used couplings to join inside the wall with the existing pipe.
Is there anything I can use to stop the leak at the threaded joint? I can tell they taped it well but it does not seem to be doing any good. To re-tape it I would have to cut out the entire faucet which I would rather not do.
I thought about trying to melt the tape away with a torch and just solder those connection to, but I don't know if that would work.
Any help would be greatly appreciated.
Thanks!