Oh and something you may not have heard about oxygen tanks;
the valve stem on the tank itself needs to be fully closed or fully open, letting the second stage of the two stage regulator control the flow.
The valve on the tanks will leak oxygen out around the valve stem other wise and will empty out your tank even if you only open the tank a small amount.
It's a design thing on the oxygen tanks.
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The Zombie Apocalypse is Upon Us.
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