Keep Service Life - The Pneumatic Check Valve can prevent the aquarium from water flowing back, which is caused by the decrease, and keep the function of carbon dioxide bottle. One Way Flow - When used in the Ozone generator, air check valve can prevent the Ozone from flowing back to the air pump and eroding the propeller. Function Well - Aquarium non return check valve can protect the power head from the water flowing back which is caused by power cut. Easy Operation - Single check valve is easy to install, requires no additional tools and can be attached to any place you like in seconds. Application - Stainless Steel One Way Check Valves are suitable for CO2 supply system in fish tank, aquarium and air pump system.
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