2 Pieces Stainless Steel One Way Check Valve Non-Return Valve for 4/6 mm CO2 Line Regulator Diffuser Tube in Aquarium System

The pneumatic check valve can prevent backflow in the aquarium caused by a decrease in pressure, thus preserving the function and lifespan of the carbon dioxide cylinder. NOTICE: Use only for carbon dioxide pressure vessels made of steel and cannot be used for DIY projects or oxygen pumps because the pressure is insufficient to operate the valves.

When used in an ozone generator, the air check valve can prevent ozone from flowing back into the air pump and damaging the impeller.

The aquarium check valve can protect the feed head from water backflow caused by a power outage.

The simple check valve is easy to install, requires no additional tools, and can be attached to any location of your choice in seconds.

These one-way stainless steel check valves are suitable for the system CO2 supply in aquariums, fish tanks and other aquariums.