Teflon tape on flare fittings

[TDW]

Threads on a flare fitting do nothing as far as sealing. The seal comes from the taper of the pipe or tubing being pressed into the sealing surface of the fitting. A thread lube is a good idea on the threads just to prevent galling and make the flare nut tighten down a little easier.

[JoeG]

OK --In a ****quick fix ****if the flare is just having a problem seating against the face of the nipple fitting and unless the flare itself is not split or chipped--wiping some blue paste on & around the **face** NOT threads of the nipple fitting usually stops the leak----------I've had to make ***temporary repairs*** in a pinch ------Replacing a worn flare fitting is the proper procedure for a permanent repair--------save teflon for the faucet. ......