TwistedPhil
+1y
I always use Teflon tape and I've never had a problem. If you use Loctite, I think you have to wait for it to cure before you air up, or it will blow out of the thread area.
As for PTC fittings, stick with brass or nickel DOT approved fittings and you should be fine. Make sure your line is clean, cut straight, and doesn't have a bunch of scratches on it, too!
We prefer compression fittings because of their tighter seal, but PTC is definitely easier to set up!
Good luck!
-Phil at FBI