Check Valve

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  • Prevent Water Siphoning Out of Aquarium
  • Rubber Valve For Longevity
  • Essential for Power Outages

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. 

Customer Reviews

Based on 331 reviews
mikestl (St Louis, MO, US)
Great product, good value

I have the AC check value on two tanks. They are easy to install but snug enough so they stay put, and they don’t seem to significantly impede air flow. Highly recommended.

Robert R. (Homestead, FL, US)

looks strong , good quality

Adrian H. (Flagstaff, AZ, US)
Needed part, best I’ve seen.

These are made by a few manufacturers. I’ve had others come apart, but the Aquarium Co-op ones have been solid so far.

John R. (Delmar, NY, US)
Check Valve

Excellent product

Cameron H. (Cheboygan, MI, US)
It's a check valve!

It's a check valve! Does exactly what it's supposed to do and the clear plastic with black valve looks really sleek combined with the Aquarium Co-Op black air line tubing