PVC Backwater Valves are designed to prevent fluids from re-entering drainage systems, should backflow occur. Unidirectional flow through the valve is created by a flap that freely opens during outflow, and is trapped closed if backflow occurs.

• Both ends fit over Schedule 40 DWV pipe

PVC Backwater Valves are designed to help prevent fluids from re-entering drainage systems, should backflow occur. Unidirectional flow through the valve is created by a flap that freely opens during outflow, and is trapped closed if backflow occurs.

• Both ends fit over Schedule 40 DWV pipe

PVC Backwater Valves are designed to prevent fluids from re-entering drainage systems, should backflow occur. Unidirectional flow through the valve is created by a flap that freely opens during outflow, and is trapped closed if backflow occurs.

• Both ends fit over Schedule 40 DWV pipe

Extends Spears Backwater Valve access to surface

Extension Pipe NOT INCLUDED

Backwater Valves are designed to prevent backflow in numerous applications where easy service access for maintenance and cleaning is needed. Excellent for use in sanitary or storm sewer drainage systems to prevent waste back up due to inadequate drainage, for balancing multi-level ponds, aquaculture features or storage tank systems, and many other applications. Spears® Backwater Valve has
been engineered for improved function and easier service, especially in buried service with use of optional Service-Access Extension Kit.

• All PVC Construction with EPDM Flapper Seal
• Threaded Top Plug for Convenient Service
• Simple Snap-In Internal Flapper Assembly for Easy Replacement
• Optional Factory Assembled Service-Access Extension Kits - External Housing with Internal Extension for Convenient Removal, Inspection or Replacement 
• Optional Extension Components Kits for Assembly with User-Supplied Pipe
• Available in Sizes 2", 3", 4" and 6" with Socket Ends
• Direct Connection to ASTM D 2665 PVC DWV or other  IPS size pipe. Spears® IPS x Sewer Adapters Available for Connection to ASTM 3034 Sewer
• Conforms to ASME/ANSI A112.14.1 for Backwater Valves
• Pressure Rated to 43 psi (100 feet of head) @ 73°F

Extends Spears Backwater Valve access to surface

Extension Pipe NOT INCLUDED

Backwater Valves are designed to prevent backflow in numerous applications where easy service access for maintenance and cleaning is needed. Excellent for use in sanitary or storm sewer drainage systems to prevent waste back up due to inadequate drainage, for balancing multi-level ponds, aquaculture features or storage tank systems, and many other applications. Spears® Backwater Valve has
been engineered for improved function and easier service, especially in buried service with use of optional Service-Access Extension Kit.

• All PVC Construction with EPDM Flapper Seal
• Threaded Top Plug for Convenient Service
• Simple Snap-In Internal Flapper Assembly for Easy Replacement
• Optional Factory Assembled Service-Access Extension Kits - External Housing with Internal Extension for Convenient Removal, Inspection or Replacement 
• Optional Extension Components Kits for Assembly with User-Supplied Pipe
• Available in Sizes 2", 3", 4" and 6" with Socket Ends
• Direct Connection to ASTM D 2665 PVC DWV or other  IPS size pipe. Spears® IPS x Sewer Adapters Available for Connection to ASTM 3034 Sewer
• Conforms to ASME/ANSI A112.14.1 for Backwater Valves
• Pressure Rated to 43 psi (100 feet of head) @ 73°F

A Backwater Valve is designed to function as a check valve in a drainage pipe to prevent flowing liquid, such as sewage, from reversing its direction. There are other applications for Backwater Valves, such as multi-level pond balancing for Aquascape applications or for storage tank balancing for industrial and agricultural applications. Backwater Valves should not be confused with Backflow Preventers which are used in potable water supply systems.

Backwater valves are most important if you are on a public sewer system, especially if you are the lowest home on the line where you could have everyone’s sewage above you flow into your home if there is a stoppage in the mainline after your connection. Some jurisdictions require Backwater Valves on new construction.

• Replaceable internal flapper assembly
• Extension Kit Adapter components allow easy construction of a valve extension with user supplied pipe cut to desired length
• Direct Valve Connection to ASTM D 2665 PVC DWV or other IPS size pipe. Spears® IPS DWV x Sewer & Drain Adapter Bushings are available for connection to ASTM D 3034 & ASTM D 2729 Sewer pipe
• Standard Valve Adapters Pressure Rated to 50 psi (115 feet of head) @ 73°F (23°C) - Optional 100 psi Adapter (232 feet of head) available
• Conforms to ASME/ANSI A112.14.1 for Backwater Valves

• Available in Sizes 3", 4" and 6" with Socket Ends

Extends Spears Backwater Valve access to surface

Extension Pipe NOT INCLUDED

Backwater Valves are designed to prevent backflow in numerous applications where easy service access for maintenance and cleaning is needed. Excellent for use in sanitary or storm sewer drainage systems to prevent waste back up due to inadequate drainage, for balancing multi-level ponds, aquaculture features or storage tank systems, and many other applications. Spears® Backwater Valve has
been engineered for improved function and easier service, especially in buried service with use of optional Service-Access Extension Kit.

• All PVC Construction with EPDM Flapper Seal
• Threaded Top Plug for Convenient Service
• Simple Snap-In Internal Flapper Assembly for Easy Replacement
• Optional Factory Assembled Service-Access Extension Kits - External Housing with Internal Extension for Convenient Removal, Inspection or Replacement 
• Optional Extension Components Kits for Assembly with User-Supplied Pipe
• Available in Sizes 2", 3", 4" and 6" with Socket Ends
• Direct Connection to ASTM D 2665 PVC DWV or other  IPS size pipe. Spears® IPS x Sewer Adapters Available for Connection to ASTM 3034 Sewer
• Conforms to ASME/ANSI A112.14.1 for Backwater Valves
• Pressure Rated to 43 psi (100 feet of head) @ 73°F

Convert from Schedule 40 to SDR35 with bushing Part# P118-040

A Backwater Valve is designed to function as a check valve in a drainage pipe to prevent flowing liquid, such as sewage, from reversing its direction. There are other applications for Backwater Valves, such as multi-level pond balancing for Aquascape applications or for storage tank balancing for industrial and agricultural applications. Backwater Valves should not be confused with Backflow Preventers which are used in potable water supply systems.

Backwater valves are most important if you are on a public sewer system, especially if you are the lowest home on the line where you could have everyone’s sewage above you flow into your home if there is a stoppage in the mainline after your connection. Some jurisdictions require Backwater Valves on new construction.

• Replaceable internal flapper assembly
• Extension Kit Adapter components allow easy construction of a valve extension with user supplied pipe cut to desired length
• Direct Valve Connection to ASTM D 2665 PVC DWV or other IPS size pipe. Spears® IPS DWV x Sewer & Drain Adapter Bushings are available for connection to ASTM D 3034 & ASTM D 2729 Sewer pipe
• Standard Valve Adapters Pressure Rated to 50 psi (115 feet of head) @ 73°F (23°C) - Optional 100 psi Adapter (232 feet of head) available
• Conforms to ASME/ANSI A112.14.1 for Backwater Valves

• Available in Sizes 3", 4" and 6" with Socket Ends

Convert from Schedule 40 to SDR35 with bushing Part# P118-040

Extends Spears Backwater Valve access to surface

Extension Pipe NOT INCLUDED