Quote Originally Posted by PNW Rodder View Post
...... now it holds 125psi for 2 days without a noticable drop (testing only, I drain it every night when in use).
Just curious, why do you drain the tank every night? You're venting off air that's already dropped out moisture (heat of compression, cooled to ambient in the tank, moisture condenses and collects in the bottom of the tank). If you just pop your drain valve open to blow off collected condensate as you leave the shop I'd think you're good unless you have concerns about your tank. Another option would be to turn off power to the compressor, so it doesn't run at night if it does happen to leak down. Again, just curious, no big deal.