Penn-Plax® Check Valve w/Air Filter for Aquariums

I bought this check valve for one of the sponge filters I ran on my shrimp tank. It seems to work somewhat, but it never really got the chance to prove itself in an emergency situation. It's kind of a generic cheapy check valve, really only being protected by a simple piece of plastic that covers a hole when air/water is forced in the wrong direction. I can see it failing in an emergency... Once I accidentally put this check valve on backwards during maintenance. Quite dissapointed in it's preformance as it should not have let any of the air through. It stopped most of the air but there were still a few bubbles that made it past. The point of a check valve is to let no flow of air or water go through the wrong direction, and this one has failed. I can imagine in an emergency situation it would buy me some time, but eventually water would make it to the air pump (actually it might not since I keep my air pumps higher than my tanks, but I use a check valve anyways to be safe). Recently I bought some check valves and I found them to be of MUCH higher quality for less than the price of the Penn-Plax. It's opened my eyes to how shoddy these check valves are.

EASY install and does what it's suppose to. I had a power outage recently and this little filter prevented water from back flowing into my air pump, so it's a great cheap buy to ensure you air pumps quality of air and protection for the pump

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This unit simply failed to work when installed properly. A close inspection revealed cheap construction. I would avoid this particular brand if I were you.

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You can't go wrong with these check valves. Durable, sturdy, reliable. Best brand I've used. Others have broken on me, not Penn Plax though!

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