11 best check valves for sump pumps

Check valves for sump pumps play a crucial role in ensuring the efficient and reliable operation of a sump pump system. They are essential components in preventing water from flowing back into the sump pit or basement after it has been pumped out. Here's what you need to know about check valves for sump pumps:

Function: A check valve, also known as a one-way valve or backflow preventer, allows water to flow in only one direction. In the context of sump pumps, it allows water to flow out of the sump pit and discharge it outside but prevents water from returning back into the pit once it has been pumped out.
Installation: Check valves are typically installed in the discharge pipe of the sump pump. They are placed above the pump and below the discharge outlet. Proper installation is crucial to ensure they function effectively.
Types:
- Swing Check Valve: This is a common type of check valve used for sump pumps. It has a hinged flap that swings open to allow water to flow out and then swings closed to prevent backflow.
- Vertical Check Valve: This type is designed to be installed vertically, which can save space in some installations.
Materials: Check valves for sump pumps are often made of durable materials like PVC, ABS, or thermoplastic. These materials resist corrosion and are suitable for use in a wet environment.
Size: The size of the check valve should match the diameter of the discharge pipe used in your sump pump system. Common sizes include 1.25 inches and 1.5 inches.
Maintenance: It's essential to periodically inspect and clean the check valve to ensure it functions correctly. Debris or sediment buildup can hinder its performance.
Benefits: Check valves help prevent water from flowing back into the sump pit, reducing the risk of pump cycling, which can extend the life of the pump. They also help maintain the prime of the pump, ensuring it's always ready to pump water when needed.
Reliability: A properly functioning check valve is crucial for the overall reliability of your sump pump system.If the check valve fails, water can flow back into the sump pit, causing the pump to cycle frequently and potentially leading to premature pump failure.

In summary, check valves for sump pumps are essential components that ensure efficient water removal from the sump pit while preventing water from returning. Proper installation and maintenance of these valves are essential to the effective operation of your sump pump system and the protection of your basement from flooding.

Below you can find our editor's choice of the best check valves for sump pumps on the market

Raybend,"Silent" Sump Pump Check Valve, 1-1/2"

Based on 546 reviews Check latest price

Product description

Engineered to allow for maximum flow from your sump pump. Raybend’s “full-flow” check valves prevent the water that remains in the sump discharge pipe from falling back into the sump pit. This avoids pumping the same water twice, extending the life of your pump. Features Clear valve body so that water movement is visible, making it easier to verify that your sump is flowing properly and the valve is seating when closed. The unique spring loaded flapper eliminates the nuisance water hammer noise of standard check valves. Durable ABS Construction for years of Service and Reliability. 1-1/2” Buna-N rubber couplings for connecting the check valve inline with 1-1/2” sump pump discharge pipes. All Check Valve connections feature ALL STAINLESS STEEL Hose Clamps to prevent rust and corrosion and a secure, leakproof connection.

Sump Pump Silent Clear Check Valve MODEL RFF15NC
Clear valve body so that water movement is visible
The unique Stainless Steel spring loaded flapper eliminates the nuisance water hammer noise of standard check valves
100% Stainless steel clamps included-fits 1-1/2" pipe
1 year warranty

User questions & answers

Question:	What is it’s pressure rating? I need 60psi
Answer:	Hello Thanks for your information. This is Betty at your service. Our 12.5ft pontoon boat is for two persons series. So it is available to place two seats. Sincerely Betty
Question:	If this check is oriented to allow full downward flow from an open washer drain hose, will it stop non-pressured backflow from a connected drain
Answer:	Hello This is Joy at your service Thanks for your inquiry The length of the first rail is about 36 inches The length of the second rail is about 18 inches This length is convenient for customers to fish And the oar height is moderate, saving effort when rowing Our boat is different from other boats in that four separate cabins (including two additional reinforced cabins) can provide extra buoyancy and there is less risk of capsizing when catching big fish. The grab bar is made of 304 high-grade stainless steel and high-composite plastic, which has anti-rust performance We will advise customers to wear life jackets. Hope this answe can help you Sincerely Joy
Question:	If installed horizontally, does the flapper need to be in any particular orientation? ie. hinged part or opening up, etc
Answer:	Hello This is Joe from AQUOS to answer. Thanks for your information. The transom board on this boat is 4.7 inch. The gas motor with short shaft is suitable. Have a nice day. Joe
Question:	Will this work with a ejector pump
Answer:	Hello, this is Alice at your service, it is 3 x layer 0.9 mm/1100 D UV Coated PVC. Have a nice day.

Jackel Sump Check Valve (Model: DJ-545)

Based on 320 reviews Check latest price

Product description

The Jackel-DJ-545 was first introduced in the mid-1970's and it is by far the world's most popular sump check valve with over 10 million installed! The Jackel-DJ-545 features Jackel's own 1-1/4" or 1-1/2" combination adapters and the most durable check valve flapper in the industry. This is one of the world's most reliable sump pump check valves.

Fits 1-1/4" or 1-1/2" black, galvanized or DWV Schedule 40 pipe
The most durable flapper in the industry
Strong and durable ABS body
All stainless steel clamps and fasteners

User questions & answers

Question:	I put this valve in the sump discharge. It's in correctly, but when the pump stops I can hear the water gurgle down & the pump restarts. Any ideas
Answer:	Natural gas but you can buy a conversion kit to make it for propane
Question:	What is the maximum recommended distance between the lower discharge pipe and the upper discharge pipe? My old check valve gave out
Answer:	Fits Rheem Square combustion chamber
Question:	Do you have the 1 inch
Answer:	This burner/sensor assembly was a perfect replacement fit for my 15 year old GE brand water heater. My answer is that I had to visually compare the original burner assembly with the picture provided. Beyond that I cannot say for sure if it will fit your W.H. model.
Question:	Can this be run horizontally? And not vertically ie “in line
Answer:	Yes it will

Hydro Master Plastic Sump Pump Check Valve with Stainless Steel Clamps for 1-1/2 inch or 1-1/4 inch

Based on 116 reviews Check latest price

1-1/2" or 1-1/4" Slip-on check valve for most sump pumps
Made of strong ABS body and EPDM rubber on both ends to prolong service life
Stainless steel 301 clamps and fasteners for corrasion and rust resistance
Can be installed vertical or horizontal, but vertical would be best
Reducing water noice

User questions & answers

Question:	Will this work for 1 1/4 pvc pipe
Answer:	No
Question:	Is this a swing, spring assisted swing, or ball check valve
Answer:	No they can't
Question:	What is the length of the valve
Answer:	Yes
Question:	can you fold the rubber to install in existing vertical pipe
Answer:	Yes

Product features

Hydro Master 0521105 Plastic Sump Pump Check Valve with Stainless Steel Clamps

THE BASEMENT WATCHDOG Model KCV1 1-1/4 in or 1-1/2 in Klunkless Sump Pump Check Valve

THE BASEMENT WATCHDOG

Based on 76 reviews Check latest price

Product description

The Basement Watchdog Klunkless Check Valve has a large silencing air chamber that absorbs the downward force of the water after the pump stops, diminishing the loud clunk when the flapper closes. Now, you won’t be awakened on rainy nights by a clunking noise every time the sump pump stops.

From the Manufacturer

Eliminates the irritating -"clunk"-Inch when sump pumps turn off. Patented silencing air chamber absorbs the shock. Easily installed on both 1-1/4-Inch and 1-1/2-Inch pipes. Includes stainless steel hose clamps.

Silencing air chamber reduces the loud CLUNKING sound when your sump pump shuts off
Check valve installs easily on both 1-1/2” and 1-1/4” pipes with no gluing required
Airtight chamber helps prevent water re entry back into the sump pit
Includes stainless-steel hose clamps for easy installation
Ground water use only. Not for use in sewage or ejector pits

PumpSpy Quiet Sewage or Sump Pump Check Valve - 2 Inch

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Product description

Engineered to allow for maximum flow from your pump. PumpSpy “full-flow” check valves prevent the water that remains in the discharge pipe from falling back into the pit. This avoids pumping the same contents twice, extending the life of your pump. Features a clear valve body so that movement of pumped content is visible, making it easier to verify that your pump is flowing properly and the valve is seating when closed. The unique spring-loaded flapper eliminates the water hammer noise of standard check valves. Comprised of durable ABS construction for years of service and reliability. Includes 2 inch Buna-N rubber couplings for connecting the check valve inline with 2 inch discharge pipes. All check valve connections feature stainless steel hose clamps to prevent rust and corrosion while providing a secure, leak-proof connection.

Quiet clear check valve for use with sewage, effluent, and sump pumps
Clear valve body allows visibility of pumped contents
The unique spring-loaded flapper eliminates the water hammer noise of standard check valves
100% stainless steel clamps included - fits 2 inch pipe
2-year warranty

Raybend, "Silent" Sump Pump Threaded Check Valve, 1-1/2" NPT to 1-1/2" Pipe

Raybend

Based on 37 reviews Check latest price

Product description

Engineered to allow for maximum flow from your sump pump. Raybend’s “full-flow” check valves prevent the water that remains in the sump discharge pipe from falling back into the sump pit. This avoids pumping the same water twice, extending the life of your pump. Features:: A unique spring loaded flapper eliminates the nuisance water hammer noise of standard check valves; Durable ABS Construction for years of Service and Reliability.; 1-1/2” Buna-N rubber coupling for connecting the check valve with 1-1/2” sump pump discharge pipes; ALL STAINLESS STEEL Hose Clamps to prevent rust and corrosion for a secure, leakproof connection.

Sump Pump Silent Threaded Check Valve MODEL RFF15TH
The unique spring loaded flapper eliminates the nuisance water hammer noise of standard check valves
100% Stainless steel clamps included-fits 1-1/2" pipe
Threads directly into the pump's 1-1/2" Outlet to connect it to a 1-1/2" Pipe
Pre-drilled weep hole to eliminate air lock that may occur in bottom suction pumps.
1 year warranty

User questions & answers

Question:	Does the spring loaded flapper need an larger horse power pump to open the flap as opposed to a rubber flap
Answer:	No it does not.

Pentair FP0026-6D-P2 Parts 2o Sump Pump Check Valve

Pentair

Based on 45 reviews Check latest price

Product description

Parts2O, 1-1/4" - 1-1/2", Sump Pump Check Valve, For Flexible Pipe. This Product is Highly durable. This Product is easy to use. This Product is Manufactured in China.

From the Manufacturer

Check valve for well pumps.

Manufactured in China
Easy to use
Highly durable
Fits sump pumps with 1-Inch to 14-Inch discharge
Prevents water in discharge line from draining back in sump when pump is not running
Flapper type valve requires minimal unseat pressure
May be plumbed with accordion sump discharge hose, polyethylene PVC, or galvanized pipe
Complete installation instructions included

User questions & answers

Question:	what are the thread sizes on the bottom? Looks like two different sizes
Answer:	I believe your are perfectly fine. Our daughter is 5 months and 15 pounds. Chunky girl! It’s fits her great. There is still plenty of room to grow in it. The canopy does a great job at keeping to much sun on baby.
Question:	Does this come with clamps? There are none shown
Answer:	Thanks for your question，Plz Note: 1.The baby swim ring is not life-saving supplies, it is required accompanied by a guardian. 2.Please keep eyes on your babies when using.We kindly advice do not push the float when using which may increase security risk. 3.To prevent excessive expansion, please control the inflation saturation of about 80-90%. 4.The material of canopy is galvanized iron, please keep dry after use, extend the service life of canopy. Have a nice day LAYCOL
Question:	Does anyone know what the output hose barb dimension is? i have 1.25" id hose and i can not find a dimension on any of the specs
Answer:	No a large would not be too big.
Question:	Hi gang, will the outlet of this valve fit 1.5" pvc? my pipe going outside is
Answer:	I would say get Large. My son is 19 pounds 9 months & he fits perfect in it with some room for him to grow. It helps that it has straps which you can loosen up or tighten up to make it smaller or bigger

Raybend Quiet 2 Inch Sewage Pump or Sump Pump Check Valve

Based on 27 reviews Check latest price

Product description

Engineered to allow for maximum flow from your sewage, effluent, or sump pump. Raybend’s “full-flow” check valves prevent the water that remains in the discharge pipe from falling back into the pit. This avoids pumping the same contents twice, extending the life of your pump. Features Clear valve body so that pumped content movement is visible, making it easier to verify that your pump is flowing properly and the valve is seating when closed. The unique spring-loaded flapper eliminates the water hammer noise of standard check valves. Durable ABS Construction for years of service and reliability. 2 inch Buna-N rubber couplings for connecting the check valve inline with 2 inch sump pump discharge pipes. All check valve connections feature stainless steel hose clamps to prevent rust and corrosion while providing a secure, leak-proof connection.

Quiet clear check valve for use with sewage, effluent, and sump pumps
Clear valve body allows visibility of pumped contents
The unique spring-loaded flapper eliminates the water hammer noise of standard check valves
100% stainless steel clamps included - fits 2 inch pipe
1-year warranty

PumpSpy Clear Quiet Sump Pump Check Valve - 1 1/2 Inch

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Product description

Engineered to allow for maximum flow from your sump pump. PumpSpy check valves prevent the water that remains in the sump discharge pipe from falling back into the sump pit. This avoids pumping the same water twice, extending the life of your pump. Features Clear valve body so that water movement is visible, making it easier to verify that your sump is flowing properly and the valve is seating when closed. The unique spring-loaded flapper eliminates the nuisance water hammer noise of standard check valves. Durable ABS Construction for years of Service and Reliability. 1-1/2” Buna-N rubber couplings for connecting the check valve inline with 1-1/2” sump pump discharge pipes. All Check Valve connections feature ALL STAINLESS STEEL Hose Clamps to prevent rust and corrosion and a secure, leakproof connection.

Sump pump check valve 1 1/2 inch (Model: CV-150)
Clear check valve body so that water movement is visible
The unique spring-loaded flapper eliminates the water hammer noise of standard check valves
100% Stainless steel clamps included-fits 1-1/2" pipe
2-year warranty

Raybend Dual Pump Install Kit - PVC WYE with Integrated Quiet Sump Pump Check Valves

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Product description

The Raybend Dual Pump Install Kit includes everything you need to connect two sump pumps to a single discharge line. You will no longer need to waste time piecing together PVC fittings, couplers, and check valves. Ready to install out of the box. Replaces the need for standard PVC WYE fittings and comes with integrated quiet sump pump check valves. There is no need to measure, cut, or glue any PVC! Easy installation: Simply screw the check valves into both pumps and insert the Y-connector into the check valve boots. Then, attach the rubber boot to the top of the Y-connector and to your discharge line. Lastly, to finish the installation, tighten the stainless steel clamps. Your pump installations will be complete in a fraction of the time. This kit is compatible with all pumps that have a standard 1-1/2" NPT pump discharge.

Easily connect two sump pumps with only a screwdriver
Used for installing a primary and backup pump combo, or two primary pumps
Fast and clean installation - no need to measure, cut, or glue any PVC
Replaces the need for standard PVC WYE fittings
Quiet check valves allow noise-free operation

ProCheck Quiet Sump Pump Check Valve With Upgraded Vibration Resistant Couplings, 1-1/2”

Fernco

Based on 9 reviews Check latest price

Product description

Designed for maximum flow from your sump pump. ProCheck “full-flow” check valves prevent remaining water left in the sump discharge pipe from falling back into the sump pit. Features clear valve body so that water movement is visible, making it easier to verify that your sump is flowing properly and the valve is seating when closed. The unique spring-loaded flapper eliminates the loud water hammer noise of standard check valves. Durable ABS construction for years of service and reliability. Fernco ProFlex Specialty Couplings connect the check valve in-line with 1-1/2” sump pump discharge pipes and creates an extra-secure pipe connection, engineered with no-rust stainless shields, clamps and bands.

QUIET INTERNAL VALVE: Silent sump pump check valve QCV-150
ENDS NOISY WATER HAMMER: Spring loaded flapper creates positive shut-off after pump cycles.
CLEAR VALVE BODY: Visually verify water movement, and clog free operation.
STAINLESS SHIELDED PROFLEX COUPLINGS: Engineered to resist pipe vibration & movement. Rubber interior ridges designed to ensures pipe is securely locked into coupling.
FITS 1-1/2” PIPE: Assembled valve = 7-1/4” H x 3” W. Installs horizontally or vertically.