For nearly thrity years we have been selling Paintball CO2 cylinder/bottle refilling and support equipment. Most likely you have seen our equipment at your local filling station.
These PB fill stations require a source of liquid CO2 for refilling.
Any standard gas CO2 cylinder can be used in the field by inverting it so liquid will come out. For stationary use, a 20 or 50 pound syphon (liquid) tank is recommended since it will not have to be inverted. Our kits come with detailed instructions.
Note: These refill stations will only refill paint ball cylinders due to the special O-Ring configuration used in their sealing in the marker and in the universal fill adapter. See Other Re-fillers section for Standard CGA-320 valve refilling kits.