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One-Way Check Valve, Plastic One-Way Non-Return Check Valve, For Fish  Aquarium

<ul><li>Using plastic material, beautiful and durable</li><li>When the position of the air pump is lower than the water , prevent the backflow of water from damaging the front air pump or other equipment. After adding the check valve, the air pump can be placed above the water or below the water , and there will be no backflow of water when the air pump stops working</li><li>Prevent the water in the fish from flowing back into the air pump and burn the air pump to avoid danger</li></ul>

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Specification: Condition: Item Type: Non-Return Check Valve Material: plastic Color: As picture shown Optional Size: 3mm, 5mm, 7mm3mm: The interface diameter is 3mm/0.1in 5mm: The interface diameter is 5mm/0.2in 7mm: The interface diameter is 7mm/0.3inSuitable for: Aquarium air pump Function: Used as an oxygenation pump due to the water current reversed due to the pressure difference between the inside and outside when it suddenly stops working, damages the oxygenation pump and causes the water in the to overflow to form property damage, prevents the water in the fish from flowing back into the air pump, and burns the air pump to avoid danger. Indispensable accessories for air pumps. Package List: 10 x Non-Return Check Valve