Aquarium Check Valve

A Check Valve is essential when your Air Pump is positioned at or below the waterline of the aquarium. If your power goes off, this valve will prevent water from siphoning back onto the floor and destroying your Air Pump. Position the Check Valve into the airline just after the Air Pump.

Helpful Tip
If there is no flow to the airstone, it generally means the check Valve has been installed the wrong way.