Automotive Oil Line Spring & Vacuum Check Valves, PA66 Material, 1/8" to 5/16" Sizes, High Temperature & Corrosion Resistance (3/16" x 2 PCS)

Work perfect good quality. I use a lot of them. I will buy more. Thank you.

I bought these to use in line with tubing which goes from the sink soap dispenser pump down into a container of dish soap which sits in the sink cabinet. Without the check valve I could get the tubing primed and it pumped a little but once I stopped using it the soap slowly dropped back down into the soap container. But with the check valve installed the soap stays in the tubing so that whenever I press the soap pump handle I get dish soap dispensed. It removed the difficult task of trying to fill the soap dispenser bottles which were screwed up under the sink. The bottles are no longer under the sink - just tubes running down into the larger dish soap bottle which is very easily replaced. I realize that this was not the original intent for these check valves but they work well for my use which I found from a kind soul who posted a video on YT..

easy to use seems well made

nice check not cheep junk

Seem decently sturdy, barbs were the right size. They work good as far as I can tell, I cannot speak to longevity as I did not use them long term.

It is ok for sheerness, I know you will do much better, I hope more upgrades thanks

My motorcycle need vacuum applied to the fuel petcock to keep running. It is a safety feature to prevent fuel flow when the engine is off. I was experiencing a loss in vacuum when going up hills under load. The bike would shut off when this happened. I would have to idle the bike for a minute and then I would be able to drive until I came up to another hill and the same thing would happen. Installing this valve corrected the issue! It saved me a lot of headaches. Thank you!

I needed these for the kaboom chlorine dispenser to prevent the chlorine from back flowing to the fill valve. Needless to say, it did the job.