WANGCL 10 Pack Aquarium Air Pump Check Valve Accessories Fish Tank One Way Non Return

When pump put the position below the surface to prevent water back damaged the front Air pump or other products equipment. Our high quality aquarium check valves are ideal for connection in line with your air pump to prevent water back siphoning from your aquarium through your air pump. After joining the check valve pump can be higher than the surface can also be placed below the surface of the water, will not appear when the pump stop working power water reflux. Safe, non-toxic, environmentally friendly and totally harmless to your fish. One way Design , it is great fish tank air flow control valve. The Aquaculture Air Valve can be connected to aquarium tubing.