-=Almazick=- wrote:

Is it ok to use O2 cylinder for CO2?



Yes, but you will have to get the valve changed. IIRC, O2 cylinders are
rated 2200 pounds, and CO2 cylinders are rated 1800 pounds. Then you'll
probably have to get your tank filled rather than swapping it out, and you
will have to pay to get it tested every 5 or 10 years. If you buy a 20# or
smaller CO2 tank, you can swap it out whenever it needs filling and you'll
never have to pay for hydrostatic testing.

HTH

Bob