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We use these check valves to keep water from siphoning out of the tank when the power is out.  They are made with a rubber flapper instead of a spring like some of the cheaper ones. 

Check Valve

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We use these check valves to keep water from siphoning out of the tank when the power is out.  They are made with a rubber flapper instead of a spring like some of the cheaper ones. 

Customer Reviews

Based on 50 reviews
80%
(40)
8%
(4)
6%
(3)
2%
(1)
4%
(2)
A
A.
Glad I ordered a check valve with my sponge filter

If you're new to sponge filters like me, check valves are a must-have! They prevent the water from siphoning out of the tank and back to the air pump if the power shuts off. I had to check a few YouTube videos, but if the red part of the valve looks like a top hat, then the brim/bottom of the top hat should be facing/closer to the air pump and the top of the hat should be facing/closer to the sponge filter. The product itself looks to be of good quality and pretty robust. Definitely worth the add-on.

T
T.J.
Does the job

The check valve works as it is supposed to.

M
M.L.
Seems to be doing its job.

Fairly easy to install. I wasn't sure what direction the valve was supposed to point, so I had to look it up.

D
D.

It’s a check valve...and it works like well a check valve does haha. No complaints here.

A
A.L.
Check valve

This one comes apart which is great incase you have an issue with the valve not letting air thru . Unless you want you airpump sitting in top of your tank you will need this or your water can Siphon out .