Ans Check Valve for air usage ( 2pc a pack )

Simply Aquatics Verified independent store

→

Check valve to stop water from flowing in the wrong direction and accidently draining an aquarium in the event of an air pump failure. Keep air flowing in the right direction and s top water from flowing out of the tank Use the air check valve as a safety precaution whenever using air pumps Use with aquarium air line tubing and an air pump to allow air out and keep water from flowing back not suitable for Pressurized Co2 system Show more