Air Supply Check Valve 1125500-DW Check Valve, Blower, Air Supply

Have tried many check valves and this one is the best hands down. Easy to install, silent, and can see water in.

Works well

Once you get past the horror of replacing the old one with this, which thank the heavens is a quick task with the band clamps (have a large bucket in place, and pray you don't have six feet of "effluence" trapped above it when you undo that last clamp), and have finished decontaminating everything in sight in case it splashed out, you can enjoy the spectacle of safely watching your poo flow by every time the pump kicks on. It's like a tiny little pooquarium most of the time, at least in vertical installations, as whatever poo-water is still in the vertical pipe above the valve when the pump stops, stays in the vertical pipe above the valve. It always did, just now you can see it. Which is helpful for seeing at a glance if the pump is actually moving anything when it runs, and what exactly, in disgusting detail, is being moved. If your old valve was a cheap Home Depot special like mine was, and would always thump loudly like a demon pounding to get out of the poo-well, startling the bejeezus out of you in the middle of the night every time the pump stopped becuase a six foot column of poo water slammed the valve close, these geniuses somehow also made your new pooquarium virtually silent too. Great upgrade to a rather horrifying part of your plumbing system, giving you a way to easily monitor and partly diagnose what's going on with it, when necessary, without having to traumitize yourself by actually unsealing the lid of that cursed pit, until you know you have to. Or if you've decided to traumatize your plumber instead, you'll be able to give him a little more information to work with beforehand.

Very quiet. Easy to install.

I bought this valve on January 12, 2025 and it came unglued on March 8, 2025 and my basement started flooding. I wasn’t happy.

i have purchased 10 of these. the flapper breaks off and is not repairable.i still use them because i like to be able to see the water flowing.these are for a sump pump. water only so nothing to break the flapper connector.just cheaply made