Pawfly 6 PCS Aquarium Check Valves One Way Non-return Protector Air Pump Accessories for Fish Tank,Black

Bought for an outside solar oxygenation pump. Been solar it doesn’t run all the time, pump didn’t come with non return so bought these..

Bought theses for safety reasons made pump quieter in the process can be tight to fit just pop airline in boiling kettle water few seconds slide straight on great purchase

This one-way valve is good at it's job, albeit rather brittle plastic.You need to remember this has two inlets for air and one outlet. You only need use one of the air inlets (it won't come out of the other inlet). I can only see it useful if your pump has two outlets and you want to use them both. If it worked the other way you could run two air stones off one pump, which I think would be a far more common and useful thing to have.

So far so good,haven't had any problems with this item.

The first one tried, spurted water everywhere! So there’s a reason why they’re not sold singly! Luckily the second one was ok.

These do what they need to do and I have had no leaks yet…fingers crossed.

outstanding value

I have installed 2 of these one way valves at the moment and I find that they make a whistling noise with air flowing through them so I will be removing and binning the prpduct

I use these to ventilate water bottles that I drink from through a hose (like a CamelBak system, but from a bottle instead of a bladder). I drill a hole in the cap for the hose, and another for one of these check valves. This keeps the bottle from spilling, but lets air in so that the bottle doesn't collapse when I drink. These valves are very simple and easy to clean. The two-piece housing is threaded, and the valve itself is held between the halves. I use a short piece of plastic tubing on the valve nipple to make a tight fit with the hole I drill in the bottle cap.

Me gusto mucho es mejor de lo que yo pensaba hace muy bien su trabajo

Like that they’re threaded so you can mess with the rubber falange if it starts making noise. I actually like that they’re bigger than what you’d find at LFS seems to allow better airflow! Great for the price!!

So uh... They work fine. Sir goes in one side and out the other, but not the reverse. That's what they're supposed to do.But they whistle. Anyone else hear it? It's freaking loud. Hopefully I get used to it quickly or I'll be looking to replace these with hopefully quieter ones.I have one installed between my air pump and sponge filter, and one between the air pump and air stone.

These are working fine so far, fit my standard airline tubing. Shipping was fast.