Oatey 4 in. PVC Backwater Valve-43904 - The Home Depot


Model # 43904

Internet # 100144734

Store SKU # 730409

4 in. PVC Backwater Valve

Oatey 4 in. PVC Backwater Valve

This item has been discontinued.
The Home Depot no longer carries this specific product.

$38.57 / each


Model # 43904

Internet # 100144734

Store SKU # 730409

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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Product Depth (in.)  11  Product Height (in.) 
Product Length (in.)  11 in  Product Width (in.)  7.5 
Valve Inlet Diameter (in.)  Valve Outlet Diameter (in.) 
Compatible Pipe Material  PVC  Connection  Sewer & Drain 
Material  PVC  Maximum Pressure (psi)  80 
Maximum Working Temperature (F)  150  Product Weight (lb.)  .5 lb 
Rating  80 psi  Returnable  90-Day 
Warranty / Certifications
Manufacturer Warranty  1 year 


Rated 5.0 out of 5 by 2 reviewers.
Rated 5.0 out of 5.0 by 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!!! May 6, 2014
Rated 5.0 out of 5.0 by 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. June 25, 2013
  • 2015-04-17T10:45:48.268-05:00
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