Assure all CO₂ shut-offs are on.
Assure quick coupler is working and attached properly.
Assure that bulk tank is turned on.
Check bulk tank regulator to see if tank is low or empty. Change bulk tank if needed.
Assure that CO line is not pinched.
Check CO₂ line for frozen moisture. If frozen, thaw, then trace down source of moisture; such as a bad check valve on tap.
If air is being used instead of CO₂ as the source of gas, this may cause moisture in the CO₂ line.
Inspect check valve to assure it works properly and is not clogged.
Make sure check valve has a split in it.
Check for a frozen regulator. If frozen, check system for leaks. If no leak is found, the CO₂ demand on the system may require a second CO₂ supply.
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