Lee's Check Valve (1 per pack)

• Check valve provides protection during a power failure
• Helps to protect furniture, carpeting and precious live stock
• If pump failure, the check valve is intended to slow down the sudden reversal of air flow, helping to prevent a siphon action from starting
• Has No Metal Parts To Rust, High Quality Plastic
• Look for the words AIR IN and AIR OUT on the check valve. Install valve in the airline between the pump and the top of the aquarium (outside the aquarium). Lee's check valve needs to be replaced every 12 months.