10-01-2017, 07:12 AM
I always just assumed it was a safety feature on the valve. I mean, one-way valves are not exactly hard to make. Blood vessels have them to prevent backflow.
Also the difference in the gas composition/pressure you would get from emptying a low-volume tank into a high-capacity canister would be miniscule.
Also the difference in the gas composition/pressure you would get from emptying a low-volume tank into a high-capacity canister would be miniscule.