Our unit works with GAS CO2 only, not liquid CO2. liquid CO2 will create a bad taste in your drink. New from SPUNKY , coil hose connection CGA-320 ,G5/8 and W21.8 Large CO2 Tank adapter fits Most Soda Maker Beverage machines. Fits most Soda Maker Beverage machines and allows normal operation without any permanent changes. Save money on refills. This system allows you to connect your Soda marker Machine to an external Non-Siphon CO2 Tank that has a CGA-320 ,G5/8 and W21.8 Outlet Valve, like 2.5lb 5lb, 20LB or 50lb commercial CO2 tanks. Our station features a coil hose system and 1500 psi rated coil hose.