NDS 3 in. ABS Backwater Valve-375 - The Home Depot


Model # 375

Internet # 100128063

Store SKU # 637487

3 in. ABS Backwater Valve

NDS 3 in. ABS Backwater Valve

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

$27.11 / each


Model # 375

Internet # 100128063

Store SKU # 637487

NDS 3 in. ABS Backwater Valve protects low areas or basements from the backflow of waste from a street sewer. The quick-action flapper allows an unrestricted, unidirectional flow, and the flapper's elastomeric gasket ensures a watertight seal. Designed for use in the installation of non-pressurized drainage and sewer piping systems.

  • ABS construction is durable, lightweight, economical and resistant to corrosion and chemicals
  • Hub outlets are suitable for use with DWV pipe. May be adapted to sewer and drain pipe with NDS DWV to Sewer drain adapters
  • Hub x Hub solvent-welded connections
  • Fits 3 in. DWV Schedule 40 pipe
  • Maximum working pressure of 5 PSI
  • Working temperature range of -30 - 140 degrees Fahrenheit
  • Made to ASTM specifications
  • Elastomeric gasket in the flapper ensures a watertight seal
  • Neoprene gasket in the access cap provides a positive seal
  • Access riser with cover offers simple access to the backwater valve for inspection and maintenance
  • Threaded cap is designed for hand tightening
  • Black color
  • Made in the USA
  • NDS offers a full line of solvent weld fittings for all of your sewer and drain needs. NDS solvent weld fittings are offered in ABS, Styrene and PVC and range in size from 3 in. to 8 in.


Product Height (in.)  5.03  Product Length (in.)  3.0 
Product Width (in.)  3.53  Valve Inlet Diameter (in.)  2.75 
Valve Outlet Diameter (in.)  3.75 
Compatible Pipe Material  ABS  Connection  Sewer & Drain 
Indoor/Outdoor  Outdoor  Material  Acrylonitrile Butadiene Styrene (ABS) 
Maximum Pressure (psi)  Maximum Working Temperature (F)  140 
Product Weight (lb.)  1.66 lb  Rating  DWV 
Returnable  90-Day 
Warranty / Certifications
Manufacturer Warranty  Limited Lifetime 



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