Rhinox Brass Check Valve - Aquarium CO2 Diffuser Regulator Air Pump Tubing Metal

Works perfectly. Good product and good price. Would buy again.

I use this on my co2 tank and I've had it for a few months without any issues. I refilled my tank last week (hasn't been used in a few months) and water was getting past the check valve and in the silicone tubing. Idk how long they are suppose to last, but it was good while it lasted.

The item works great. Be aware it ships from Singapore, and shipping takes a couple of weeks.

product was a little sticky at first. Couldn't get gas to flow but it finally came loose and works good.

After reading other reviews I had high hopes these would work with my CO2 system. Water gets right past them every night. I unfortunately bought 3 of them and I have the same problem with all 3. Perhaps there was a bad batch but given my experience I would advise looking elsewhere for a bog check vale. This was not it.

Solidly built and works. I have cut the co2 and the water doesn't come pouring back out.

Works most of the time, some water sneaks through

It's a valve. What more can I say? It's made of metal, which gives me piece of mind with using it with my CO2 system for my aquarium over the plastic ones. But boy, it sure is expensive for what it is... Seemed like other places were asking the same money--but I'm still thinking I should have looked around more. You should. That's not a reflection of the product, which is why I give it four stars. I'm subtracting one star for value, not quality, which is fine.