Marina Check Valve

Check Valve Whether youre a beginner fish hobbyist or have kept an aquarium for many years now, youll find Marina products to be user-friendly and affordable, supporting the life and habitat of your fish for years to come. A must for all air pumps, the Marina Check Valve prevents water from siphoning out of the aquarium through the air hose and into the air pump in the event of a power failure, or when removing filters and other air-driven accessories from the aquarium. Simply place it inline of the air hose.