Stainless Steel CO2 Check Valve

When CO2 regulator is not on, water will seep through the diffuser and travel down the pipeline. CO2 check valves prevent water from reaching the CO2 regulator.

Attach it inline on the CO2 pipe with the arrow aligning to the direction of CO2 flow. Place it as close to the diffuser as possible without it touching water. Replace check valves every year for optimum CO2 flow.