Clscea Metal Check Valve 2 Pack

The Clscea AC301 is a metal check valve sold in packs of 2. Plastic air valves are fine for a basic air pump, but a pressurized CO2 line needs a valve that can handle higher pressure for years. These metal valves have a working pressure of 7.25 – 145 psi.

Why a CO2 line needs a check valve

When the solenoid closes or the cylinder runs empty, water can creep back up the tubing toward the bubble counter and regulator. Water in a regulator can damage it. A check valve near the tank blocks that backflow while letting gas pass when pressure is on.

Fit

• Fits 1/4-inch air tubing
• Fits the Clscea hook-type stainless-steel diffuser
• Push-to-connect, no tools needed

Push-to-connect fittings grip the tubing with an internal collet, so connections are quick and easy to undo for maintenance.

Build quality

Clscea says the valves use premium materials with good sealing and are built for higher pressures and a long service life. Metal does not get brittle or cloudy the way some plastics do.

Where to place it

Install the valve after the bubble counter and as close to the diffuser as practical. That keeps the column of water that could backflow short. Check the flow arrow before you push the tubing in. Having a second valve on hand helps if you run two tanks or want a spare.

Who it is for

This valve suits planted tank keepers on pressurized CO2. It is overkill for an air pump, though it would work there too. If your diffuser already has a built-in valve, such as the FZONE acrylic diffuser, a second valve still adds a layer of safety for the regulator.

Maintenance

Check the seals every few months and replace a valve that lets gas leak or sticks closed.