Como 10 Pcs Blue Plastic Check Valves for Fish Tank Aquarium Air Pump

These check valves do what they are supposed to do, prevent back siphoning. They also seem to remain clear over time, unlike the more common and more expensive type which seem to "clog up" and restrict the air flow somewhat as they age. Some of them have untrimmed thin bits of plastic at the nibs, but it doesn't affect their function so it's of no importance to me.

My order arrived on time and included a coupon for more items that expired one week ago :-)

These blue vlaves are just over an inch long and one side clearly has the work "OUT" on it.

This is my first time using a product like this. I tried to look thru it and it appeared like a dark gray rubbery shield is inside the unit. I blew into the air IN side and air passes, and you can hear a flexible manifold flap open. I definitely feel this adds some resistance to the air flow though. I tried my hardest to blow into the OUT side and nothing at all came out, so I expect this will work.

I also purchased Como Aquarium Y Shaped Clear Plastic Airline Air Tubing Connectors 10 Pcs from the same seller, to cut down and share the flow from my powerful air pump. Hydrofarm AAPA15L 6-Watt 15-LPM Active Aqua Air Pump with 4 Outlets because some reviewers said you can split the air.

With the use of these Valves, I my not be able to use the Y connectors, if there is any reduction to the force of the air. Hopefully this will not harm my pump. I am new to all of this and will report if I actually have any problems, but everything looks good and since there were no reviews yet, I wanted to report what I see for other newbies who were wondering.

I am not aware if there are other manufacturers or these or how the quality compares.

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