Internet #100144734

Model #439042

Store SKU #1003322064

4 in. PVC DWV Backwater Valve

  • Protects low areas and basements from backflow or waste water
  • Tight, waterproof elastomeric seal inside flapper
  • Hub fits DWV but can be adapted for sewer and drain
  • See More Details

Frequently Bought Together

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Price:
$3038

Product Overview

Prevent sewage or any other fluid from flowing back into your water system with the Oatey 4 in. PVC Backwater Valve. Its elastomeric seal inside the flapper ensures a tight seal, preventing fluid from entering. Designed for use with 4 Sch. 40 piping system.
  • Protects low areas or basements from backflow or waste from street sewers
  • Elastomeric seal in quick action flapper ensures a water tight seal
  • Threaded access cap incorporates a neoprene seal for positive sealing and can be tightened or removed by hand
  • Valve hub fits DWV pipe and can be adapted for sewer and drain pipe
  • Threaded cap

Info & Guides

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Price
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Ratings
(32)
(2)
(32)
(2)
ConnectionSweatSweatSweatSweat
ApplicationNon-Potable WaterSewageNon-Potable WaterSewage
Maximum Pressure (psi)80248024
Compatible Pipe MaterialPVCCPVCPVCCPVC
MaterialPVCAcrylonitrile Butadiene Styrene (ABS)PVCAcrylonitrile Butadiene Styrene (ABS)
Maximum Working Temperature (F)150120150120
Indoor/OutdoorIndoorIndoorIndoorIndoor
View ProductView ProductView ProductView Product

Specifications

Dimensions

Inlet Diameter (In.)
4
Outlet Diameter (In.)
3
Product Depth (in.)
11
Product Height (in.)
7
Product Length (in.)
11 in
Product Width (in.)
7.5

Details

Application
Non-Potable Water
Compatible Pipe Material
PVC
Connection
Sweat
Features
Threaded
Indoor/Outdoor
Indoor
Material
PVC
Maximum Pressure (psi)
80
Maximum Working Temperature (F)
150
Pack Size
1
Product Weight (lb.)
.5
Returnable
180-Day
Valve Type
Pressure Regulating

Warranty / Certifications

Manufacturer Warranty
1 year

Questions & Answers

31Questions14Answers

I HAVE A 3 in oatey pvc backwater valve the flaper cam off its 7 ft down its not needed can i bra...

Asked by mac December 31, 2020
1
Answer

The flapper should be removed somehow as this can cause a blockage if left in your line.

When this valve is completely submerged, the flap floats, letting water back up through. Any way ...

Asked by Aswa July 30, 2020
1
Answer

If it is completely submerged with no flow in any direction the flapper will float. The flapper needs some head pressure to either open or close if it is coming back up into the main.

Does Home Depot sells a 2 inches PVS DWV Backwater valve?

Asked by Sid June 10, 2020
1
Answer

Oatey does not carry a 2" backwater valve.

Can this be used vertically?

Asked by Rainman May 7, 2020
1
Answer

No, this must be installed horozontally.

Most of the sewer piping is 4 inch. Why in the specifications says it is a 3 in inlet and 4 in. o...

Asked by Rilo March 24, 2020
1
Answer

This is for 4" - Valve hub fits DWV pipe and can be adapted for sewer and drain pipe.

Any way to get replacement o rings for this?

Asked by JR August 22, 2019
1
Answer

Please reach out to oatey customer service for assistance with this question. (800) 321-9532

Can I use this at the end of my French drain outlet that discharges into a storm water ditch? Sometimes that ditch

Asked by Nick April 13, 2019
2
Answers

This Backwater valve allows a one directional flow of water and a flapper that will close to prevent any back flow (assuming nothing is in the line holding the flapper open). We recommend you call Oatey Technical to discuss your specific application details. 1-800-203-1155.

Can this be installed below grade outside? Will I need to make it accessible or can it be buried?...

Asked by StinkyFingers March 25, 2019
3
Answers

Yes, this product can be used outside below grade. Remember that if the backwater cap is below finished grade, a riser pipe will need to extend upwards off of the backwater cap to the finished grade of the cement or grass. This riser is needed for inspection and cleaning access. The backwater valve must be installed level to allow the internal flapper to operate properly.

the existing valve I have now is 4 3/4" across the top of the part that fits into a , I think it...

Asked by ang January 9, 2019
1
Answer

The inlet diameter is 3 inches and the outlet diameter is 4 inches.

how does it work, The picture does not show the inside?

Asked by ang January 9, 2019
2
Answers

There is a flap inside to prevent water from flowing back

4 in. PVC DWV Backwater Valve - page 2

Customer Reviews

  • 4.8
    out of 32 reviews
  • 100% recommend this product
5star-icon28
4star-icon2
3star-icon1
2star-icon0
1star-icon1
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Showing 1-10 of 32 reviews
This is what you need!!
I installed the 2" valve on my basement slop sink a few months ago after my third sewage backup. Well yesterday all my neighbors were calling to see if I had as much sewage in my basement as they did. Not one single drop. This valve worked perfectly.
by dmft
3 people found this helpful
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
by CRAIG
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
Performed as expected...
Performed as expected
by JOHN
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
by fred
It was extremely help full to prevent sewer back up...
It was extremely help full to prevent sewer back up and its awesome
by Manny
Just what I needed. Worked just right!
Just what I needed. Worked just right!
by Mick
Was as expected....
Was as expected.
by HomeDepotCustomer
Showing 1-10 of 32 reviews