Quiet Check Valve For Sump Pump

The Quiet Check Valve Is Really Quiet

Learn Why Spring-Loaded Internal Flapper Silences Check Valve Noise

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The quiet check valve is really quiet. The spring-loaded internal flapper silences sump pump check valve noise.

Learn how the quiet check valve works. Understand how the loud noise happens, how the design makes a difference in the noise level, how to install them, and what other consumers say about the quiet check valves for sump pumps.

Be an educated shopper. Know the difference between brands and their features, Learn before you buy so you purchase the best check-valve for your situation.

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(Select specific topic for quiet check valve for sump pump. Learn about quiet check valve. They are silent. Compare quiet to traditional. Shop check-valves.)

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Why Does A Check Valve Make A Loud Noise?

Check-valve installed with sump pump system

The force of water flowing backward through the discharge pipe when the sump pump shuts off causes a loud clunking thudding noise as the water hits the check-valve. Eliminating the check-valve is not the solution.

A check valve is placed in line with the PVC discharge piping connected to the sump pump discharge port to prevent water remaining in the discharge pipe to flow back down the pipe through the pump and back into the pit when the pump motor turns off.

The check-valve prevents the sump pump from pumping the same water over and over and prevents unnecessary wear and tear on the pump.

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Why Install A Quiet Check Valve?

The quiet check valve is really quiet. The spring-loaded internal flapper silences pump check valve noise.
 
By installing a quiet check valve there will be no need to ask why there is such a loud sound when your sump pump shuts off. There will no longer be a loud clunking thudding sound. The quiet check valve will ensure quiet operation greatly reducing the noise level in your finished basement and on the first floor.
 
Surprisingly, your pump runs quietly; the noise you hear is the check-valve. Discover more about how the quiet check valve works and hear on the video below how much of a difference a quiet-check-valve makes.
 
 
 

How Does The Design Make A Difference In The Noise Level?

Sump-pump-check-valve design comparison

The sump pump motor and impeller give velocity to the water as it moves upward. The check valve gate opens upward as the water comes through. The profile of the gate makes a difference in how the liquid flows through.

The more specifically the gate is designed to give passage to the water and air without causing a change in its velocity, the smaller the amount of pressure loss. The lower the pressure loss, the quicker the gate moves back into closed position preventing air and water from going through the sides of the gate and causing water hammer.

The more precise the fitting of the gate to the wall of the inner chamber the better the seal and the lower the chances of water hammer.

By applying the explanation provided above, it becomes obvious there is a distinct difference between the hydrodynamic design of the Brady, Campbell, AY-McDonald and Zoeller check valve and the common hardware stocked check-valves.

In addition, when putting ones finger inside the inner chamber and feeling the movement of the gate, it becomes obvious that the spring gate of the Campbell check valve will close rapidly.

The noise level of a spring gate and a swing flapper can be compared to a screen door which does or does not have a compression arm that controls the doors closing.

Screen doors with a compression closing arm at the top do not bang shut. The arm controls how fast the door closes and prevents it from slamming shut.  In the same way the spring of a quiet check-valve controls the closing of the gate.

Screen doors without a compression closing arm at the top of the screen door bang shut because there is nothing to control the closing. The swing valve does not have a spring and therefore bangs shut when the pump shuts off and the remaining water in the pipe flows backwards down the discharge pipe towards the pump.

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How Does The Noise Of Sump Pump Check Valve Brands Compare?

Pump Check Valve Noise Comparison

Campbell, Brady and Magic Plasitcs rank number one. They are known to be most quiet. Their hydrostatic design uses the 1/2 pound spring loaded gate which causes the gate to open and close when 1/2 pound of pressure is present with the water flow.

Zoeller and Valterra rank second. The shape of the valve body is slightly different; however, consumers cannot tell the difference between the noise level and that of those ranking number one.

AyMcDonald ranks third. AyMcDonald uses a different design relying more on the disks to deafen the water clapping sound. Even though the disk has a spring, the spring has zero tension on it to control the closing.

Basement Watchdog ranks fourth. Basement Watchdog uses a completely different design. It has an additional air chamber to absorb the noise.

The traditional flap (non quiet) Zoeller, Little Giant, Flotec and Wayne rank fifth. They have no spring loaded gate to control and thus reduce the noise level. They work fine if you do not mind a noise every time the sump pump shuts off and the water flows backwards and hits the flapper.

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Which Manufacturers Make The Quiet Check Valve?

Magic Plastics, Valterra, AYMcDonald, and Basement Watchdog

Magic Plastics and Valterra are the largest manufacturers of quiet check valves, also known as the silent check-valve. Their hydrostatic design uses the 1/2 pound spring loaded gate as mentioned above which causes the gate to open and close when 1/2 pound of pressure is present with the water flow. Magic Plastics also has 'smart' magnetic styles which use a magnetic 2 pound spring loaded gate which causes the gate to open and close when two pounds of pressure are present with the water flow. Magic Plastics manufacturers the brands Campbell, Brady and Zoeller. The Campbell and Brady design are the same as Magic Plastics but branded as Campbell and Brady. The Zoeller design is slightly different.

Valterra's body design of the quiet-check-valve is slightly different in shape, but as effective in reducing the water hammer.

AyMcDonald uses a different design as mentioned above relying on the double disks to deafen the water clapping sound which does not reduce as much of the water hammer. Their spring for the disk has no tension; therefore it does not control the rate at which the disks close.

Basement Watchdog adds an additional angled pipe, open at the top but connected to the check-valve on the right side, to act as a tube through which the noise escapes.

The Best Sellers Brands: Campbell, Brady, Zoeller

Campbell 1.5 in Quiet B-0823-15 Sump-Pump Chk Valve

The most popular model of the Campbell is B-0823 which has a clear outside chamber wall so the operation of the check-valve can be monitored by the homeowner. It is fascinating to watch the gate (flapper) open and close. The valve is so quiet that many homeowners say they watch the flow of water through the chamber and the movement of the gate (flapper) to see if it is still operating. The Brady Model has a solid white chamber outer wall in case you do not wish to see the valve in operation.

The Zoeller quiet-check-valve models are also popular because homeowners and plumbers recognize Zoeller sump pumps as the number one pump. Their chekc-valve also has a hydrodynamic design. Customer reviews indicate the Brady, Campbell, Zoeller, Magic Plastics and Valterra are all effective in reducing the noise to almost nothing.

The brand names Magic Plastics and Valterra are becoming more well known by residential customers. Until now their focus has been mostly commercial and industrial.

The Basement Watchdog with its additional air chamber to absorb the noise, is especially popular for those who install Basement Watchdog products.

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Is Quiet Pump Check Valve More Expensive?

The quiet pump check valve is not more expensive than other sump pump check valves.

The Campbell and Brady were very comparable in price at the time of this comparison. Campbell was $16.56 and Brady $17.55. Zoeller Quiet Model was around $24, The Basement Watchdog Klunkless was most expensive at $24.99. Wayne was cheapest at $9.61. Traditional flap Zoeller and Little Giant check valves were the same price $11.25. Flotec was $13.25.

Based on price comparison, Campbell and Brady are the best.
 
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Do Consumers Say Quiet Check Valves Are Really Quiet?

Read consumer reviews to see what they say

The Brady is quiet.    September 21, 2014
By James White, New Hampshire

My plumber put in a new sump pump. The new sump worked fine, but I began to notice after it finished its cycle there were two loud "clunks". I began to investigate and found the noise was due to the check valve closing and the pressure in there was making a "water hammer" clunk. I mentioned this to the plumber. He told me he put in a good quality check-valve, but I could tell he did not seem to know as much on this topic. So I did more research and found the Brady model, purchased it and asked him to install it for me. He seemed a little skeptical, but said he would try it. There is barely a sound now. I am so glad I found this.

Silence at last    August 1, 2014
By Cindy Johnson, New Jersey

Total silence. This has changed my life. To think I listened to the clunking thudding sound for over 20 years. Its so quiet I have to remember to check the sump pump system to make sure it is working. I do not hear a sound. I really think it is cool to see the gate work through the clear plastic. I love my Campbell check-valve.

This works.    July 31, 2014
By Jim Yates, Chicago, IL

I have a one horsepower pump. I was having trouble with all other manufacturer check-valves either blowing apart (rubber type) or failing prematurely. I was wondering if I would ever find a good check-valve. I found the Campbell. It works with my one horse power pump. I can see the internals to see if everything is working properly. There is no noise either. If you want a reliable quiet-check-valve look no further. I have bought 3 of these, one for each pump in my house, and will never turn back to any other type.

Why did I not know about this sooner.     July 15, 2015
By Judy, Illinois

The Ay McDonald silent valve has changed my life. Everything is so quiet in the house now. We live in a high water table so our pump runs every 15 minutes during dry days. I got so used to hearing the clunking sound but now I can't hear it upstairs any more. This is a great invention.

No more water hammer sounds.    April 22, 2015

For years I listened to the water hammer sound when our sump pump went off. I installed a Campbell silent valve 23 inches above the pump, and it solved my problem completely. No sound at all now! I have a 1 1/4 PVC so bought adapters to transitiion to the size of my 1 1/4 PVC since the ends are 1 1/2 inches. It was not that expensive either.

A quiet check-valve at last.    March 5, 2015
By Dale Johnson, Indiana

Our sump pump made such a noise when it shut off. I thought it was the pump. In talking to a plumber I learned it was the check-valve. I asked him what he would recommend. He suggested the Campbell quiet-valve. I found one at Amazon for a great price. I installed it myself. Not really hard to do. Now it is so quiet when the pump runs. This is a great product.

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Listen! Quiet Check Valve Is Quieter.

Listen for yourself. Can you hear the difference between a traditional and quiet-check-valve? The following video clearly demonstates the difference in noise level.

 
 
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How To Install A Quiet Check Valve.

Quiet Chk Valve for Sump Pump
Quiet check valves are easy to install. Here are nine steps.
  1.   1)   Note how your old check-valve is attached to the PVC discharge pipe. Many valves have a rubber coupler on both ends held in place tightly by a screwed band. The quiet check valve has a coupler fitting that can be glued directly to the discharge pipe and a union that unscrews from the coupler fitting.
  2.   2)   Hold the new quiet check-valve next to the existing valve. Note the difference in length. Quiet check-valves are around nine inches in length. If the new valve is longer, then the PVC discharge pipe will need to be shortened. If the new valve is shorter, an additional length of PVC discharge pipe will need to be added.
  3.   3)   Before turning the pump off by unplugging it, remove as much water from the sump pit as possible.
  4.   4)   Remove the old check-valve expecting the remaining water in the discharge pipe to shower out when the old valve is disconnected.
  5.   5)   Determine if the distance between the two ends of the discharge pipe where the check-valve is installed is sufficient. To shorten, mark where the discharge pipe should be cut and use a hack saw to shorten it. To lengthen, add an additional piece of discharge pipe attaching the extra piece by either using a rubber union and stainless steel clamp or gluing a PVC coupler to attach it to the existing PVC pipe. We added an additional coupler.
  6.   6)   Make sure the new check-valve is in the 'up' position.
  7.   7)   Glue (prime first then glue) the quiet check valve coupler to the PVC discharge pipe. Wait for glue to dry according to manufacturer specifications.
  8.   8)   Plug the sump pump into the electic outlet.
  9.   9)   Listen how quiet the check-valve is.
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What Sizes Are The Quiet Check Valves?

1/2, 3/4, 1, 1 1/4, 1 1/2, 2, 3 Inch Diameter Sizes Available

One and One-Half Inch Diameter

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The most popular size for the Quiet check valve is 1 1/2 inches (one and one-half inches). Both Campbell, brady, Magic Plastice, Valterra, Ay McDonald, and Zoeller make the 1 1/2 inch model.

Two Inch Diameter

Fortunately the quiet check valve also comes with a diameter of 2 inches. It is nice to know that two inch diameter models are available because a homeowner with a 2 inch PVC disharge pipe is very likely to have a lot of water pumped from the sump pit during heavy rainstorms. Eliminating the loud slapping sound or water hammer would be very noticeable and make a very big difference. Both Campbell, Masgic Plastics, Valterra, Ay McDonald and Zoeller make the 2 inch model.

One and One-Fourth Inch Diameter

Only AY McDonald manufacturers the 1 1/4 inch valve.

Three Inch Diameter

Three inch diameter quiet-check-valves are available from Magic Plastics, Zoeller, and Valterra. A three inch discharge piping system moves a lot of water in one pump cycle.

One and One-Half Inch Diameter

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One Inch Diameter

One inch diameter quiet-check-valves are available from Magic Plastics and Valterra. A one inch discharge piping system is less common.

One-Half and Three-Fourths Inch Diameter

One-half and three-fourths inch diameter quiet-check-valves are available from Valterra.

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One and One-Half Inch Diameter

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What Eight Quiet-Check-Valve Connection Types Exist?

There are basically nine types of check-valve connection ends and connection types. Each connection type is different. Some connection types are easier to install. In addition some connection ends are easier to remove when it comes to replacing a failed check-valve. Knowing what kinds are available will help you make a wise decison when buying your next check-valve.

Eight Basic Connection Types

1) Hose Clamps Both Ends

Hose Clamp x Hose Clamp Comection Check-Valve At Pumps Selection

The rubber (hose) at both ends of the check-valve are slipped over the discharge pipe and held in place by clamps which are tightened by a screw driver. This type of connection is considered easiest to install and remove because there is no gluing required or cutting of pipe if the same length of check-valve is installed.

2) Slip x Slip Both Ends

Slip x Slip Comection Check-Valve At Pumps Selection

Both ends of the check-valve are smooth and slip inside of the check valve. To secure them in place both ends must be glued to the discharge pipe. Slipping the chec-valve into the discharge pipe and gluing them together isa easy however when it is replaced, the check-valve must be cut from the discharge pipe. If the replacement check-valve is too short to fill up the existing space between the two ends of the discharge pipe, additional discharge pipe and a coupler or untion will be required. A union is the best choice because it can be unscrewed.

3) FIPT x FIPT

FIPT X FIPT Comection Check-Valve At Pumps Selection

both ends are threaded on the inside. Both ends will accept a piece of threaded male PVC of the same dimension. Most of the time the discharge pipe is not threaded; therefore it is necessary to buy a pice of discharge pipe with a threaded union or coupler.

4) Spigot x Slip

Spigot x Slip Comection Check-Valve At Pumps Selection

The spigot end is a smooth (not threaded) male fitting that must be glued into another fitting that has a Slip end connection of the same size. A spigot end can be inserted into a smooth female ended pipe.

5) Spigot x Spigot

Neither spigot end can be connected to another spigot end, which is what a discharge pipe is, without adding a coupler or a union. A coupler can be glued in between the discharge pipe and the check valve end for connecting; however they cannot be taken apart. On the other hand a union can be inserted which means the discharge pipe is glued into one end of the union and the check valve end is glued into the other end; however the union has a collar and 0-ring so it can be unscrew so the discharge pipe and check valve end can be separated.

6) Union x Union

Union x Union Comection Check-Valve At Pumps Selection

Union x union (also known as true union) means the check valve is located between two threaded union ends and can be unscrewed from each end while one end of the union remains attached to the discharge pipe. Because the union end where the check valve is attached is threaded, the check valve can be easily removed for cleaning or replacement.

7) Spigot x Union

Spigot x Union Comection Check-Valve At Pumps Selection

Spigot x union means the spigot end of the check valve is glued into the discharge pipe and the union end not attached to the check valve is also glued into the other end of the discharge pipe. The check valve can be unscrewed from the union.

8) Compression

Compression Comection Check-Valve At Pumps Selection

Compression means the compression fitting itself consists of a threaded nut, anti-slip collar and compression ring rubber seal. The nut slip is removed from the check valve and slid onto the smooth non threaded PVC discharge pipe, then the slip collar is slid on followed by the black rubber seal ring. The nut is slid toward the check valve end and screwed tight. This makes for easy removable of the check valve for replacement or cleaning.

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When Should An Old Quiet Check Valve Be Replaced?

Quiet check valves do not wear out quickly. If your sump pump does not run much you will probably never have to replace it.

With a clear valve body you will see when the spring flapper no longer keeps the water from running back down the discharge piping and into the pit. When the pump shuts off, listen for the sound of water flowing back into the pit. When this water situation occurs it is time to replace an old valve.

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Consider Five Steps Before Buying

  1. 1) Decide on the type of quiet check valve (spring loaded gate, spring loaded gate with magnet, double disk or spring with swing gate).
  2. 2) Identify size needed (1/2, 3/4, 1 , 1 ¼, 1 ½, 2, 3 inches)
  3. 3) Determine fitting type desired (hose clamp, slip x slip, FIPT x FIPT , slip x spigot, spigot x spigot, spigot x union, union x union, compression)
  4. 4) Measure length needed. Measure the length of your existing check valve unit. If your previous check vale had hose clamps, union x union or compression end fittings you can replace just the check valve body. If your existing check valve end fitting were glued without a union, measure the distance between where the old check valve ends would be cut out from the discharge pipe. If the check valve unit is not long enough, an additional piece of PVC can be added to the discharge pipe with a union connection so next time the quiet-check-valve is replaced, the union end with the nut can just be unscrewed and the replacement check-valve can be easily screwed in.
  5. 5) Decide on the brand (Campbell, Brady, Magic Plastics, Zoeller, Wayne, Little Giant, AY McDonald) Not all brands have all types of end fittings, diameter sizes and quiet check valve types. Ay McDonald is the only brand using the double disk for reduce the water hammer sound. The other brands use the spring loaded gate to make the check valve quiet.
 

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