- Silent Check Valve - 1-1/2" with Buna-N Couplings, Model CV-150, Spring-Loaded Flapper, Sump Pump Life Expectancy Increase, Includes Steel Clamps Fit 1-1/2″ Pipe

This thing works so well I had to double-check it was actually on. It’s impressively quiet—like ninja-level quiet. If it were any quieter, I’d be wondering whether it was powered by thoughts and prayers instead of actual engineering. Build quality is solid and feels made to last, with a secure fit and no leaks. The clear housing is great too—it lets you peek inside like you’re inspecting a tiny science experiment, except everything is working exactly as it should (a rare joy). Easy to install, whisper-silent in operation, and rock-solid performance. Honestly, the loudest thing about this item is me telling other people how good it is. Highly recommend.

Easy quick install valve works like a charm and silent. Competitive pricing quick shipping appears to be quality product too early to rate durability good vendor would definitely repurchase if needed.

I installed these on my two sump pumps and immediately noticed a difference! No more thumping and gurgling. These valves are super easy to install, are whisper quiet and perform flawlessly! Being able to actually see the valve operate is also a big plus! Very pleased with this purchase and would highly recommend!

I recently had to replace a 20 year old sump pump and I initially made the mistake of not replacing the also 20 year old check valve. I went ahead and ordered this relatively inexpensive part. Installation was super easy. No need to worry about screwing this on a threaded PVC piece, I just slipped the rubber ends on and tightened the metal bands using a flathead and it was nice and snug. Once I turned on the new sump pump, it worked like a charm and super seamless! No leaks and it was really quiet too! I love that I can also visibly see the little stopper that’s inside. Save yourself the labor costs getting a plumber to install, you can do it yourself with YouTube and some good ol’ fashioned manual labor.

For the low price, I am overall happy I found this product. Prior to installing this, our softener would wake me up at night when it was running a cycle - with a loud bang. This makes it completely silent. It is amazing how good it works. It lasted 2 years and 3 months after installing (product has a 2 year warranty). But for $25-$30 , well worth having! What happened is that the Valve Body broke, causing water to leak. The Valve Body is two pieces that should have been glued together all around, but instead, only half of it was glued. The unglued half started leaking. There is only 1/8" of overlap joining the two pieces, and this is not enough to withstand the pressure of the kind of installation I have. 1/8" is not much holding these two pieces together. I had it supported on one side, or it would have blown apart. As it is, the pressure inside that caused the unglued half to come apart even broke the edge on that half (1st photo). If these are all built the same, make sure you put a thrust block against the cap so the cap doesn't blow off the end. I had the block on it, so there was only a leak, and thankfully the entire utility area was not flooded. It definitely makes it very quiet, so that is good. Would be good if the two pieces were joined together more securely, considering the back pressure from a 2" pipe and the hammering from the water that it needs to stand up to. Will need to be replaced every couple of years, for sure. Noise reduction is excellent, though.

This check valve is incredible. My old one sound like a giant thud everytime it ran. This absolutely silent completely eliminated the hammer noise

I wish I had known about this years ago. No more water hammer! This thing is whisper quiet and takes stress off the pump.

The word SILENT certainly fits this description for the valve! Easy to install, tight fit and quiet!

Love the see through housing, easy installation and it's of course very quiet. Game changer...

works great !! price is right!!

Works as described. Easy install and no more banging when the pump shuts off!

This silent check valve did exactly as advertised. Totally eliminated the bouncy ball noise and thumping noises produced by my other valve. Installed easily. Great product.

This is an excellent upgrade to basic check valves. It is almost entirely silent and prevents the loud thunk you get with regular or simple check valves. It's a premium high quality product that seems very durable for long term use. Installation was incredibly easy and simple with everything you might need.