Co2 Fill station comes dual turn valves to Discharge and Charge CO2. New compact design, move high volume of CO2 with bigger valve air chamber maintain constant high pressure between the line CGA 320 valve type. Work with most beer keg co2 tanks (CGA 320 threads valve) Extremely Durable for long-lasting use in any condition. All you need is RENT or BUY a CO2 tank (from soda suppliers, welding supplies) and you are all set and ready to fill your own CO2 tanks. Easy installation. Heavy Duty Fill adapter valve.