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.
The check valve works as it is supposed to.
Fairly easy to install. I wasn't sure what direction the valve was supposed to point, so I had to look it up.
It’s a check valve...and it works like well a check valve does haha. No complaints here.
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 .
$4.99 Flat Rate