Aquarium airline non-return check valves are essential to protect your air pump. It prevents water from syphoning back in to the airline tube and in to your air pump. This easy to install valve is simply place in your airline tubing between air pump and aquarium to stop water flowing back. Use when ever the air pump is installed lower than your tank.

Product Details;

• Strong plastic construction.
• Essential for protecting air pumps.
• Can be use with all types of aquarium air pump.