I have had this threaded fitting apart at least three times. First time I used tape and the next couple times pipe dope. Is it OK to use something like RTV sealant on it or do I have to unsolder the adapter and solder on a new one? I have a tube of Permatex ultra gold I was going to try. I really don't want to get back into soldering on this thing. It took me a few tries till I got it all leak free the first time.