I had a dripping pressure relief valve too. I thought I'd be smart and work the valve a couple of times, hoping it would seal better. Well, instead of the drip I once had, I got a torrent of water that did not stop. So now I want to replace my valve. I see that the old valve is installes with some "gluey" looking stuff. Does any body out there know if teflon tape is good enough for the replacement valve? ....do I need to use some special, high temperature, leak preventer?