Stainless Steel One Way Check Valve Non-Return for Co2 System

[Multipurpose Use] - These aquarium check valve are designed for CO2 supply systems in aquariums and fish tanks. Attention: These check valves are suitable for use with high-power air pumps. If it is a small air pumps, it will not be applicable.
[Durable Stainless Steel Check Valve] - The CO2 check valve is made of stainless steel material, which is durable and sturdy. And it has the characteristics of rust prevention, easy to clean.
[Size & Package] - Our fish tank check valve are 1.57x0.32Inch/40x8mm(L x D) and in 2 packs. Fits Standard Pipe Inner Diameter: 0.16Inch/4mm.
[Functional Advantage] - One way check valve can prevent the aquarium from water flowing back, which is caused by the decrease, and keep the function and service life of the carbon dioxide bottle. When used in an ozone generator, an air check valve can prevent ozone from flowing back to the air pumps and corroding the propeller.
[Installation] - Easy to install, no additional tools required, can be connected to any location in seconds.