Hikari® Aquarium Solutions® Check Valves eliminate the risk of water siphoning backward through the aquarium airline and damaging your pump or causing an electrical short. This high quality neoprene valve provides the ideal cracking pressure to reduce surging and provide long life.
For use with freshwater or marine aquariums
Easy-to-read directional arrow for assistance with flow direction
Clear window let you know if valve is working and when replacement is needed