Quote Originally Posted by theGinsue View Post
Anyone here a propane expert?

I refilled 2 of my 20lb tanks on Saturday. Both of these tanks have been refilled within the past month and both are well within the 5 years re-inspection dates (one was re-certed in November).

I went to use one of them (then tried the other one) yesterday. I plugged my hose for my heater in nice and tight, as always. As soon as I opened the valve I heard the hiss of leaking gas. I turned it off, checked the hose tightness and screw on the side, all good. Tried again; same result. Detached the hose, re-attached the hose. Tried again, same result. By now I faintly detected the smell of the propane in the air. I swapped the tank out with the other one and had the same experience.

When I got them filled I came out from paying after the guy had 1 tank filled but I noticed that the guy doing the filling (never seen him fill tanks before) never used the screw vent on the side. I also noted the weight of the filled tank on the filling scale and the sign showing how much a filled 20lb should weigh. The second tank was OVER the weight by more than a pound.

Are these tanks TOO FULL to keep from having the excess leak when the valve is open? Is there damage due to the guy filling not using the side screw vent while filling?

I really want to be able to use this propane for my heaters but I can't allow the garage to fill with propane - especially since my wife comes out to the garage to smoke.

Any help is appreciated.
I've had this same problem with leaking out of the tank and it has always been an o-ring issue. They get old and brittle and will crack and/or fall out of the tank.