Installing the drain valves in an RV-7 and the valve turns in very easily for the first 2 turns, then hits a wall where it gets really hard to turn. I experienced the same thing using the shrader valve attachment when pressure testing the tanks, and in that case, 2-3 turns was enough to seal the assembly. I used some boelube during pressure testing, and now using EZ turn for the drain valve installation. I'm concerned about damaging the threads on the Drain flange or driving the drain too deep into causing the flange to crack open.
How far in do these normally go?
How far in do these normally go?