A check valve is used to prevent water from siphoning out of your aquarium. If water siphons out, it will usually damage the air pump and lead to water on your floor. In extreme cases, this can lead to fire if electronics are sitting in water.
A Must-Have for Every Air Pump
A simple check valve is all that stands between you and a floor full of water. If your air pump is below the top of the tank, you absolutely must add a check valve between the air pump and the air-driven device (e.g., sponge filter or aquarium decor). If the air pump ever loses power or gets turned off, the check valve prevents water from traveling down the airline tubing due to gravity.
Don't Forget About the Brine Shrimp
A common "air-driven device" that people often forget about is their brine shrimp hatchery. We have personally lost power in the middle of the night and experienced the pain of cleaning up fishy, rotten brine shrimp all over our counters. So don't forget to add that check valve!
I've only be using it for a couple of weeks but it's working well. Seems like better quality then the stuff I've bought from big chain stores.
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Dylan B. (Kittery, ME, US)
Works great
Super easy to install and use for my new tank.
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Carol T. (Seattle, WA, US)
Got the job done
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Lee A.M. (Riverside, IL, US)
Check Valve
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Customer (Seattle, WA, US)
Works as advertised
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David J.R. (Riverview, FL, US)
Super product works very well along with the pump!
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Robert H. (Jefferson City, TN, US)
Does what it should!
Works perfectly at a reasonable price. Would recommend.
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rmaiden (Burbank, WA, US)
Aquarium Co-Op Airline Check Valve – Simple, Effective, and a Must-Have!
I recently used the Aquarium Co-Op airline check valve with my new Aquarium Co-Op sponge filter, and it works perfectly! I had no idea I even needed a check valve until I watched their super helpful videos—seriously, they make setup so easy. The valve does exactly what it should: protects your equipment and keeps things running smoothly. Great product from a great company that truly supports its customers.
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Titus (Charlotte, NC, US)
Check Valve? Check!
Exactly as advertised, functional, affordable, and supportive of an amazing community. Would buy again!
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William J. (Las Vegas, NV, US)
Works as intended
Tested the valve by blowing air into each side and it only allowed flow in one direction so, seems solid.
