4 lb CO2 Cylinder – Steel – Recertified


In stock

Recertified Steel 4 lb CO2 Cylinder

This reconditioned steel 4 lb CO2 cylinder checks all the boxes—small, portable, durable, and cheap. It’s the perfect CO2 tank for charging your keg when you’re away from home, or for many other portable carbon dioxide uses.

This reconditioned 4 lb CO2 cylinder is the best value we have in a CO2 tank. It’s a cylinder that was previously in service and is now fully reconditioned. That includes a fresh hydro test, new CGA320 valve, and new rust-resistant gray paint. It’s good to go just like a new cylinder, at a fraction of the price.

Construction and Features

  • Tough steel body
  • Gray, rust-resistant painted finish
  • CGA320 CO2 valve installed

Specifications, Testing, and Approvals

  • Approximately 4″ in diameter x 20″ in height* (with valve)
  • 1800 PSI service / 3000 PSI test pressure
  • Hydro tested within 24 months of shipment
  • DOT-approved
  • Ships empty

*Note: due to differences between manufacturers, cylinder height may vary by as much as +/- several inches.

More CO2 tanks on our CO2 Cylinder Page

Additional questions? Check out our cylinder information page.

Still have questions? Email us at [email protected]

Product note: compressed gas cylinders can be dangerous if used improperly. Please be careful, know the correct procedures for use, and exercise caution when connecting and using any compressed gas device.

Additional information

Weight 12 lbs
Dimensions 5 × 5 × 21 in


Included Valve



Product Notes

Note: do not remove the valve yourself! It takes special training and tools to remove and install a valve properly. We are unable to accept cylinders on return if the valve has been removed, altered,

Gas Type

Service Pressure

Test Pressure


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