Check Valves

Aquatop Airline Air Check Valve

Features and Specifications: Plastic check valves protect air pumps from aquarium water back-siphoning damage during power failures.To use, cut airline tubing between air pump and first outlet. Attach airline to each end of valve.Valve measures 2 inches...

Hikari Air Check Valve 2 Pack

Check Valve Eliminate The Risk Of Water Siphoning Backwards Through Your Aquarium Airline! Cheap Insurance For Freshwater & Marine Aquariums Eliminates the chance of water siphoning backwards and damaging your pump or causing an electrical...

Clear True Union Swing Check Valve

Check valves allow one directional water flow and are used to prevent back flow and siphoning. These are among the highest quality check valves to be found. Relative to other types and manufacturers of check valves, these valves create minimal pressure...

PVC True Union Ball Check Valve

PVC True Union Ball Check Valve 1/2"