ADA Check Valve for aquarium CO2 tubing

ADA Check Valve for a CO2 line

The ADA Check Valve connects pressure-resistant CO2 tubing with soft silicone tubing. The silicone section makes it easier to attach aquarium glassware, while the transparent valve remains discreet alongside the tank.

The check valve helps prevent aquarium water from flowing back through the CO2 line. ADA recommends an additional high-quality metal check valve immediately after the regulator or solenoid valve for extra protection.

Connecting the tubing

1. Connect the soft silicone tubing between the valve and the glass accessory.
2. Connect the pressure-resistant CO2 tubing to the other side of the valve.
3. Include the recommended metal check valve near the regulator or solenoid.

Inspection and replacement

This product is a wear part. Inspect it regularly and replace it approximately once a year to maintain its function. Backflow protection depends on a functioning valve; the transparent design should not be treated as a permanent, maintenance-free connection.

This accessory is useful for connecting glass diffusers and other CO2 glassware while preserving a discreet appearance around the aquarium. The related ADA Clear Parts Set is linked below for complementary connection components.

ADA Clear Parts · ADA website