Originally Posted by tgreene7
I think you can get a CO2 tank filled, at a fire extinguisher supplier, not actually use a fire extinguisher for a CO2 tank.
According to this site: http://www.truetex.com/carbonation.htm
you can use an extinguisher tank, but it was a bit vague as to what type of tank to look for:
"Another source of gas is CO2 fire extinguishers, which are made typically from a 20 lb tank, except painted red and fitted with an extinguisher squeeze-valve and horn. . . . I have . . . adapted the high-side of my regulator to connect to the extinguisher valve. When empty, the gas dealer can then remove the squeeze-valve and extinguisher horn and install a standard twist valve top on the tank. Tanks should also be inspected internally and subjected to a hydrostatic pressure test after some years, so if you are not swapping tanks to refill, you should make sure your dealer is inspecting the tanks on the right schedule."
I guess it all depends on what the filler in my area is willing to work with.