Backwater & Terminal Backwater Valves

Municipal
Gravity Sewer Systems

Westlake Pipe & Fittings’ Backwater & Terminal Backwater Valves ensure one-way flow in storm and sanitary sewer lines where backflow could be a problem.

  • Available in both in-line and terminal styles
  • Each PVC valve is equipped with a free-hinged flapper that allows unrestricted flow
  • Access lid can be easily removed for inspection and cleaning
  • Both the flapper and access lid have leak-free neoprene gaskets
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Backwater and Terminal Backwater Valves

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PVC Backwater Valves Product Specification
Municipal
Plumbing & Industrial
Technical Product Specification
Gravity Sewer Systems
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PVC Backwater Valves Product Specification

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Product Options
Available in both in-line and terminal styles

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Detailed Parts Catalog

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Part # Nom Size Sizing Standard Description Class Fitting Families End Type Box Qty Crate Qty Fitting Shape Fitting Size Color Resources
P0115
 15 PSM 15 In-Line Backwater Valve, SWS PVC White HxH DR 35 S-Series HxH 1 - In-Line Backwater Valve 15" White
  • Drawings
P0104
 4 PSM 4 In-Line Backwater Valve, SWS PVC White HxH DR 35 S-Series HxH 1 - In-Line Backwater Valve 4" White
  • Drawings
P0106
 6 PSM 6 In-Line Backwater Valve, SWS PVC White HxH DR 35 S-Series HxH 1 - In-Line Backwater Valve 6" White
  • Drawings
P0108
 8 PSM 8 In-Line Backwater Valve, SWS PVC White HxH DR 35 S-Series HxH 1 - In-Line Backwater Valve 8" White
  • Drawings
P0110
 10 PSM 10 In-Line Backwater Valve, SWS PVC White HxH DR 35 S-Series HxH 1 - In-Line Backwater Valve 10" White
  • Drawings
P0112
 12 PSM 12 In-Line Backwater Valve, SWS PVC White HxH DR 35 S-Series HxH 1 - In-Line Backwater Valve 12" White
  • Drawings
P0204
 4 PSM 4 Terminal Backwater Valve, SWS PVC White H DR 35 S-Series H 1 - Terminal Backwater Valve 4" White
  • Drawings
P0206
 6 PSM 6 Terminal Backwater Valve, SWS PVC White H DR 35 S-Series H 1 - Terminal Backwater Valve 6" White
  • Drawings
P0208
 8 PSM 8 Terminal Backwater Valve, SWS PVC White H DR 35 S-Series H 1 - Terminal Backwater Valve 8" White
  • Drawings
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