I have spent the whole weekend repiping my house, ( lucky me ) and I cant get the POS copper unions to stop leaking at the point where the two halves come together. I have done what seems like hundreds of fittings and it comes down to the stupid unions leaking. I am TIRED of crawling around under my house and need some advice on how to stop the leaks.
The pipes are perfectly straight and I dont have to pull on them or "tweak" them to line them up and the mating surfaces are smooth also. Should I smother pipe dope on the mating surfaces or just adapt pvc unions to the copper and use grounding jumpers over the unions to keep a continuous ground?
.....HELP