Backwater Valves

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ASME A112.14.1

 

The ASME Standard is a nationally recognized standard that establishes requirements for dimensions, performance requirements, connections, materials and finishes, testing and marking of backwater valves.

There are six basic types of Backwater Valves:

  • Horizontal Backwater Valve: A backwater valve designed to be installed in a horizontal drain line incorporating an internal check member and manual gate valve to prevent backflow.
  • Combination Horizontal Backwater Valve and Manual Gate Valve: A backwater valve designed to be installed in a horizontal drain line incorporating an internal check member and manual gate valve to prevent backflow.
  • Terminal backwater Valve: A backwater valve designed to be installed at the discharge end of a horizontal drain line incorporating a check member to prevent backflow.
  • Combination Floor Drain and Backwater Valve: A floor drain incorporating an internal check member to prevent backflow.
  • Normally open Backwater Valve: A backwater valve designed in such a manner as not to interfere with the movement of the air in the drainage system.
  • Vertical or 90-Deg Backwater Valves: A backwater valve designed to be installed in vertical piping, such as downstream from a P-trap or a holding tank.>

 

Manufacturers

 

 

 

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Jay R Smith Mfg. Co.

 

www.jrsmith.com

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Josam Company

 

www.josam.com/catalog/line/BW

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Mifab Inc.

 

www.mifab.com/backwater-valves.html

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Wade Specification Drainage Products

 

www.wadedrains.com

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Watts Regulator Company

 

www.watts.com

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Zurn Industries, Inc.

 

www.zurn.com/products/building-drainage/backwater-valves