We use CO2 for airing up tires, operating an ARB Air Locker, Air Tools, and MIG Welding. By the way there is very little moisture (H2O) in CO2, less than 15 Parts Per Million in Industrial Grade CO2 which is 99.5% pure. You can also get Instrument Grade which is 99.98% pure. Liquid CO2 is heavier than water, so if there were any moisture in the tank it would rise to the surface and blow off first. The moisture that most people see when working with CO2 is condensation from the air. When CO2 is released from its pressurized liquid form as a gas there is a rapid temperature drop which condenses the moisture in the surrounding air. The moisture is not in the CO2.