Internet #100144734

Model # 439042

Store SKU #1003322064

0038753439044

Oatey 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
$ 34 10
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Product Overview

  • 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
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

Product Overview

  • 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
Model #: 439042
Sku #: 1003322064
Internet #: 100144734

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

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Key Features

Product Overview
Key Features
  • 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
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

Product Overview

  • 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
Model #: 439042
Sku #: 1003322064
Internet #: 100144734

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

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Compare Similar

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Specifications

Dimensions

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

Details

Compatible Pipe Material
PVC
Connection
Sewer & Drain
Features
Threaded
Indoor/Outdoor
Indoor
Material
PVC
Maximum Pressure (psi)
80
Maximum Working Temperature (F)
150
Product Weight (lb.)
.5lb
Returnable
90-Day
Valve Type
Air Admittance

Warranty / Certifications

Manufacturer Warranty
1 year

Specifications

Dimensions

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

Details

Compatible Pipe Material
PVC
Connection
Sewer & Drain
Features
Threaded
Indoor/Outdoor
Indoor
Material
PVC
Maximum Pressure (psi)
80
Maximum Working Temperature (F)
150
Product Weight (lb.)
.5lb
Returnable
90-Day
Valve Type
Air Admittance

Warranty / Certifications

Manufacturer Warranty
1 year

Questions & Answers

Believe it or not, I'm trying to find something to prevent frogs from swimming up from my septic ...

Believe it or not, I'm trying to find something to prevent frogs from swimming up from my septic system. Is this valve closed and then opens when the toilet flushes? In that case it should work for me. Alternatively if it is always open and then closes to prevent backflow it won't work.
Asked by: Frogs
Put a live snake down the end you want to keep frogs from coming through. Or a 1/4 stick
Answered by: RC
Date published: 2018-12-05

Rats: Would this be the thing to use to prevent sewer rats from getting into your sewer pipes in ...

Rats: Would this be the thing to use to prevent sewer rats from getting into your sewer pipes in your house?
Asked by: Andy
I’m not qualified to give a definitive answer but it a one way valve and closes when waste water is not flowing so I would think that it could be effective to help stop rats from coming thru unless they are determined to gnaw through the flap or enter when waste water is flowing
Answered by: Tn
Date published: 2018-04-06

Is the flap easily moved outward when discharged waste is flushed? In other words, is it just the...

Is the flap easily moved outward when discharged waste is flushed? In other words, is it just the weight of the flapper door holding it shut until another flush of toilet forces it open? Thanks
Asked by: ang
Can this be mounted and used on 4" ADS field tile going to a ditch that sometime floods?
Answered by: Bunk
Date published: 2018-12-05

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

Can this be installed below grade outside? Will I need to make it accessible or can it be buried? Does it need to be leveled? Have a window well with a drain that occasionally backs up under heavy rains cause that drain line is attached to the downspout drain line.
Asked by: StinkyFingers
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.
Answered by: Oatey
Date published: 2019-03-27
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Customer Reviews

Oatey PVC DWV Backwater Valve is rated 4.7 out of 5 by 21.
Rated 5 out of 5 by from If you ever have possibly water backings up from heavy downpours or Flooding this is a great way ... If you ever have possibly water backings up from heavy downpours or Flooding this is a great way to stop sewage from backing up into home.
Date published: 2019-09-23
Rated 4 out of 5 by from for a four inch back water valve worked just fine... for a four inch back water valve worked just fine
Date published: 2019-09-30
Rated 5 out of 5 by from very good... very good
Date published: 2019-07-23
Rated 5 out of 5 by from Just what the doctor ordered, great product!!! I was having problem with toilet backing up occasionally when we would get too much rain for several days due to the waste system getting overloaded I guess. I knew about backflow prevention devices for potable water and wondered if there was such a device for sewer lines, I pulled up the home depot website and started to search for backflow devices and there it was.........a backwater valve............awesome...........just what I had been thinking I needed to stop my dirty mess cleanup jobs in the bathroom...............this is the ticket folks!!!
Date published: 2014-05-06
Rated 5 out of 5 by from great design, all access clean-outs should be designed like that one I have been using this cleanout for 3 years and got another one for my second house. Pros: LIght, durable, flap valve to prevent backflows, Easy to open / close cap, low profile. Smart level stepdown flow. Cons: Not sold at the stores. I think they should.
Date published: 2013-06-25
Rated 5 out of 5 by from 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.
Date published: 2015-10-28
Rated 5 out of 5 by from used this product to tie in gutter drainage to a sump pump system. Did not want the sump pump to ... used this product to tie in gutter drainage to a sump pump system. Did not want the sump pump to push water back up the gutters in case of a stoppage somewhere in the line. It works perfectly, and has been for 5 years now.
Date published: 2017-05-29
Rated 5 out of 5 by from Product arrive within days, well packaged and solid construction. Very good quality Product arrive within days, well packaged and solid construction. Very good quality
Date published: 2019-02-05
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