The teflon tape is not working?

You should not need teflon tape on air couplings.


Looks as if I wasn't the only one that miss-read the OP. Sorry 'bout
that. I use the cheap couplings from HFT but found the BRASS versions
better than the STEEL (Pot metal?) set I returned as I found the
thread tolerances way off. Most of my leaking issues are with threads
(and, lately me bladder).