Quote:
Originally Posted by De Anza Art Glass Club
Do you open the oxygen tank valves all the way? If they are in an intermediate position, you may get leakage past the valve stems. If the valves are open all the way, there is a back seat to prevent leakage.
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This ^^.
And make sure to do the bubble test on each delivered tank at both ends of open and closed to make sure you don't windup with a tank that has been abused but has not been taken out of service by the supplier.
Welding shops where most tanks get used are not known for being clean work places.
Also don't forget to crack the valve before putting your regulator on to blow out anything in the area where the regulator seats.