New 5 lb. Steel CO2 Cylinder

New 5 lb. steel CO2 cylinder DOT- and TC-approved with a new CGA320 valve. This convenient little CO2 tank combines top performance with rugged strength. Thick-walled construction makes for long-term use without fractures or leaks while the cylinder finish features heavy-duty gray paint.

Carbon dioxide is best suited for steel in welding applications, and is especially useful in metal insert gas (MIG) welding because it increases weld speed, penetration and mechanical properties.

Premium Construction

  • Durable steel construction
  • Thick heavy-duty steel walls


Quality Features

  • 5.25″ diameter x 18″ height (with valve) Note: due to differences between manufacturers, cylinder height may vary by +/- several inches.
  • Tare Weight: 13.67 lbs.
  • UN/ISO stamped
  • DOT-stamped and TC-approved
  • Manufactured or hydro-tested within 12 months
  • 10-year testing period
  • New CGA320 valve
  • Painted gray
  • Applications: HVAC, Industrial, Beverage
  • Ships empty


Please Note: All CO2 cylinders are sourced from several manufacturers. As a result, cylinders may vary in dimensions. We apologize, but we are unable to take special requests at this time.

Find this CO2 cylinder and other top-quality CO2 tanks on the CO2 cylinder page.

Questions? Please see our frequently asked questions 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.

Weight 15 lbs
Dimensions 6 × 6 × 15 in


Gas Type



Painted, Rust Inhibitor


5 lb / 2.3 kg





Service Pressure

2234 PSI / 154 Bar

Test Pressure

3365 PSI / 232 Bar

Internal Volume

220 cu in / 3.6 l

Water Capacity

7.9 lb / 3.6 kg

Tare Weight

13.67 lbs.


14.76" / 375 mm


5.24" / 133 mm

Thread Size

3/4" NGT


Aquarium, Beverage, Hydroponic, Industrial






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