🐠 Enhance Aquarium Efficiency with Dr.Moss Stainless Steel Check Valve for Air Co2 Line 4/6mm Tubing Regulator Diffuser Plants Tank Review

I've used 2 of these in series and neither of them stopped the flow of water back to my CO2 sensor. Place one in front of the bubbler and the other behind the bubbler.

After many many months it is still working very well and no water is coming back. More than I can say about the cheap plastic versions.

The valve may be good but the problem is that it only works at very high pressure. Most of us inject CO2 at less than 50psi making it useless. It doesn't even open. With air pumps, this also creates tremendous back pressure on a bad pump, which is why I feel this is an impractical valve for use in regular home aquariums. The seller should make this very clear. You shouldn't come back.

ordered 2 of these, 1 arrived Friday last week, the 2nd arrived Saturday. As for the second, all I had was a plastic bag with a card and a hole in the empty pocket. no ck.valve.Update I would not recommend these valves, I thought s.steel would work in a CO'2 system. The other day I was sitting there and I heard this loud bang. Looked in the direction of the noise and saw the bubble counter leaking oil from the CO2 line. I had this check valve on a line from a gauge to a diffuser in an aquarium.