5lb Aluminum CO2 Gas Tank

A 5lb aluminum CO2 tank built for homebrew kegerators, planted aquariums, and small welding setups.

The lightweight aluminum body makes this tank easy to transport between fills, and the CGA320 valve is the standard fitting used by most CO2 regulators sold for beverage and aquarium use. The 5-pound capacity is a common refill size at most gas shops and welding stores.

Why this CO2 tank works

• Lightweight aluminum: Easier to carry to a refill location than a comparable steel tank.
• CGA320 valve: Matches the standard regulator fitting used for kegerators and aquarium CO2 systems.
• 5lb capacity: A widely stocked refill size, so most US gas shops can swap or fill it.
• Multi-use: Works for draft beer, soda carbonation, planted tank CO2 injection, and small MIG welding jobs.
• Compact footprint: Fits inside most kegerator cabinets and tucks under stands.

Specs and details

• Capacity: 5 pounds
• Material: Aluminum
• Valve: CGA320
• SKU reference: D0102HG1XZG
• Barcode (GTIN): 840349919997

Round out the toolkit with our 1-Inch Drive Air Impact Wrench.

Frequently asked questions

How long does a 5lb CO2 tank last in a kegerator?
For a typical home kegerator pouring standard 5-gallon kegs at around 12 PSI, a 5-pound tank usually lasts 6 to 8 half-barrels worth of beer, depending on temperature and line setup.

Can I refill this tank at a welding store?
Most welding and beverage gas shops can refill or exchange a 5-pound aluminum CO2 tank with a CGA320 valve. Call ahead to confirm they accept customer-owned cylinders.

Is this tank suitable for planted aquariums?
Yes. The CGA320 valve matches most aquarium CO2 regulators, and 5 pounds is enough CO2 to run a planted tank for several months between refills.

Does the tank ship empty or filled?
For shipping safety, CO2 tanks are typically shipped empty. Have it filled or exchanged at a local gas shop before first use.