TMCRAFT 5lb CO2 Tank, High Strength Aluminum Alloy Cylinder with CGA-320 Valve, DOT Approved Review (2026)

Capacity and construction

This is a 5lb CO2 cylinder built from aluminum alloy, which TMCRAFT's product listing specifies as 6061-T6, a grade commonly used for pressurized cylinders because it balances strength with lighter weight than steel tanks of the same capacity. A 5lb tank is one of the more common sizes for home kegerators, large enough to carbonate and serve several kegs before needing a refill, while still being compact enough to stand next to a keg inside a chest freezer or under-counter kegerator rather than needing a separate closet or cabinet for tank storage.

Valve and fittings

The tank comes fitted with a CGA-320 valve, which is the standard valve type used on nearly all CO2 cylinders sold for homebrew, draft beer and soda service in the United States, so it will thread directly onto the great majority of homebrew regulators without an adapter. The listing notes the cylinder carries the required DOT markings and a stamped tare weight, which is the empty weight of the tank used to calculate how much CO2 remains inside by weighing the tank on a kitchen or shipping scale, a standard practice for anyone tracking gas use between refills.

Ships empty

As with the vast majority of CO2 tanks sold on Amazon, this cylinder ships empty rather than pre-filled, so buyers need to budget for a first fill at a local welding supply shop, gas distributor, homebrew store or fire extinguisher service company, since food grade CO2 fills are not something that ships by mail. First-time buyers moving from disposable CO2 cartridges to a refillable tank should plan for that extra stop before the tank is ready to connect to a regulator and start dispensing beer, and should ask specifically for a beverage grade or food grade CO2 fill rather than an industrial grade one.

Brand track record

TMCRAFT is a newer name in the CO2 tank space compared with established cylinder brands that have been supplying the homebrew and beverage industries for decades, and the aluminum tank market includes several similarly specified alternatives at comparable price points, including 2.5lb, 10lb and 20lb sizes in the same product line. That does not mean the build quality is worse, since the core specification, aluminum 6061-T6 with a CGA-320 valve and DOT certification, matches what more established brands offer, but buyers who want the longest possible track record may lean toward a more established name for a pressurized cylinder that will be refilled and inspected repeatedly over years of ongoing use.

Who it suits

This tank suits a home brewer setting up their first kegerator who needs a 5lb cylinder sized to fit next to one or two kegs, and who is comfortable sourcing a local CO2 fill rather than needing one included in the box. It also suits anyone replacing an older or out-of-hydro-test tank with a fresh aluminum cylinder carrying current DOT markings. Buyers who need a larger capacity for a bigger multi-keg setup, or who specifically want a tank from a long-established cylinder manufacturer, may want to compare against 10lb or 20lb options or other established brands before deciding, and should also confirm their kegerator or fridge has room for the tank's height alongside a keg.

Frequently asked questions