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


Model # 43904

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
Item cannot be shipped to the following state(s): AK,CA,GU,PR,VI,VT


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.

  • Made of PVC
  • Ideal for protecting low areas or basements from backflow or waste from street sewers
  • Hub fits DWV pipe and can be adapted for sewer and drain pipes
  • Flapper has an elastomeric seal, ensuring a tight water seal
  • Threaded cap


Assembled Depth (in.)  11 in  Assembled Height (in.)  7 in 
Assembled Width (in.)  7.5 in  Compatible pipe material  PVC 
Connection  Sewer & Drain  Indoor/Outdoor  Indoor 
Manufacturer Warranty  1 year  Material  PVC 
Maximum pressure (psi)  80  Maximum working temperature (F)  150 
Minimum working temperature (F)  20  Pipe or Fitting Product Type  Valve 
Product Height (in.)  Product Length (in.)  11 in 
Product Weight (lb.)  .5 lb  Product Width (in.)  7.5 
Push to connect  Yes  Rating  80 psi 
Returnable  90-Day  Size (in.) 
Valve Product Type  Air Admittance  Valve inlet diameter (in.) 
Valve outlet diameter (in.) 



Most orders process within 3 business days.

Please allow 3 to 5 business days for Standard Shipping in addition to order processing time, which varies by product.  Items deliver by small parcel service.

If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.