Our Petco Check Valve is a simple and indispensable item that attaches in the airline between the air pump and top of aquarium and prevents water from back siphoning into your air pump that can cause water damage.
Simply cut airline at convenient location between air pump and first outlet. Ensure that indicative end is furthest from the air pump outlet. Attach airline to both ends of the check valve. If air does not flow when pump is turned on, ensure check valve is properly inserted. Reverse if necessary.
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