How do I know if my CO2 cylinder is out of gas?

There are some tests you can try to help determine if your CO2 cylinder is out of gas:

• Make sure the carbonating cylinder is tight enough and retighten it if necessary by twisting the cylinder to the right.
• If you're still not getting bubbles and if you don't hear a sputtering sound when you press the carbonating button*, you may be out of gas.
• You can get a new cylinder through our Return & Redeem program or at a participating retail location.

*In 2020, we upgraded the Crytal Sparkling Water Maker with a new, silent valve. In these Sparkling Water Makers, it is normal to not hear a sputtering sound and is not an indication of the amount of CO2 left in the cylinder.