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Internet #100144734

Model #439042

Store SKU #1003322064

4 in. PVC DWV Backwater Valve

$3891
  • 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
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Product Overview

The Oatey Backwater Valve is designed as a sewage check valve to prevent pumped water from flowing back into the basin. Its elastomeric seal inside the flapper ensures a tight seal, preventing fluid from entering. Oatey products have earned the trust of plumbing professionals for over 100 years.
  • 4 in. PVC sewage backwater valve
  • 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
  • Entire valve assembly
  • Fits 4 in. PVC Schedule 40 pipe
  • Can accommodate access sleeves made of Schedule 40 pipe
  • Hub by hub solvent weld connection

Additional Resources

From the Manufacturer

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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
90-Day
Valve Type
Pressure Regulating

Warranty / Certifications

Manufacturer Warranty
1 Year Limited

Questions & Answers

Typical questions asked about products:

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Customer Reviews

  • 4.7
    out of 42 reviews
  • 100%recommend this product
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Showing 1-10 of 42 reviews
New flapper fixed old valve!
my 13-year-old backwater valve flapper door tab broke. I purchased this unit and installed the new flapper in my old valve. worked perfectly. I had to trim the ends of the tabs and sand down the shoulders to square it up and make sure it's swung loosely. Once done I use the new gasket on the old cap. works great!
by
    • Recommended
    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
      • Recommended
      3 found this review helpful
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      • Verified Purchase
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      • Verified Purchase
      Excellent valve, exceeded my expectations!...
      Excellent valve, exceeded my expectations!
      by
      • Verified Purchase
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      • Verified Purchase
      Worked out great for a drainage system install we did!...
      Worked out great for a drainage system install we did! Keeps the water from the downspouts from spilling into the drainage system under the yard as hoped!
      by
      • Verified Purchase
      Device worked well, I used it as a temporary check...
      Device worked well, I used it as a temporary check valve device on a suction hose to siphon water from a 4 acre pond to enable repair of a leaking earthen dam.
      by
      • Verified Purchase
      1 found this review helpful
      Rating provided by a verified purchaser...
      Rating provided by a verified purchaser
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      Rating provided by a verified purchaser...
      Rating provided by a verified purchaser
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      Showing 1-10 of 42 reviews