Quote:
Originally Posted by TheProfessor
The screw I think is to let excess air out. But let other chime in on that.
Me, I have an extra full tank. So don't have to worry if grille tank runs out while cooking.
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I think you are correct about bleeding off AIR at the top of the bottle. We always keep a spare bottle. I guess using my bathroom scale to weigh the bottle is a bit
Anal...that's me..

NB
PS: NEVER lay the bottle on it's side..Always keep it VERTICAL while transporting the bottle in your car.