10pcs Aquarium Air Pump Check Valves One Way Aquarium Check Valve Fish Tank Oxygen Air Pump Retaining Valve (White)

【Air Pump Accessories】Air pump safety check valve, an essential pump accessory. Complete standard set of aquarium accessories for most brands of air pumps.

【Connect with 4mm Tubing】10pcs air pump valves, which allow a good amount of air through and prevent the aquarium water from refilling, compatible with standard 4mm inner diameter aquarium tubing.

【Function】Greatly protects the aeration pump from damage caused by backflow.

A check valve is placed in the tubing of your air line between your air pump and the aquarium water to prevent water from flowing back into the air line.

【Application】This check valve can be used to prevent water backflow from damaging front-mounted air pumps or other equipment. Perfect for aquariums, fishing shops, etc.

How to install:

1. Clean and dry both sides of the tubing before use to ensure the valve is securely attached.

2. Check the valve's flow direction to ensure it is installed on the correct side.

3. Carefully connect the air pump's return valve to the hose and connect it completely. Tip: If the valve restricts airflow in both directions, insert something into the bore on the inlet side to push the valve open. The valve will then allow air to flow in the correct direction.

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Note: The data is measured manually; please allow an error of 1-87cm. Due to differences in lighting and screen settings, there will be some color variation; the actual product received will prevail.