When I bought my used TIG welder it came with a 300 cu. ft. argon tank. I tried to use it the other day and the valve is faulty (guessing by the weight that there is actually gas in the tank).
The tank seems full and was sold as such, but nothing comes out if the valve is open. I've put a regulator on it as well and no gas.
Am I missing something or do I just have a cylinder with a bad valve? What can I do to repair besides trying to take it somewhere to empty and replace the valve?
It's likely a rental tank because there is a name stamped on the collar, although the name doesn't come up under a google search.
Ideally, I'd like to trade it in for some credit on a refill or at least use the gas.