[Bill Douglas]

Two and a half turns. I think that is what's causing the problem.

In the brass threads; rough them up with a large pair of pliers so the thread doesn't slip. My plumber friend says he does 13 turns. I check the tightness. If it's loose I do 14, if it's tight I do 12 turns.

Some joints I use hemp. I roll/stretch it out to be like fine string. Rub some copper grease (non-seize grease is good). Then wind that around. The good thing about hemp is it swells up a bit creating a water tight seal.

I'm thinking you guys tape may be thicker stuff than what we use. But the secret is to rough up the threads so it doesn't just spin around with nothing remaining on the threads.