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# P1209

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# P1209

A simple but revolutionary extendable backwater valve that eliminates the need for expensive and unsightly manholes regardless of the burial depth.

• Prevents sewage backup into a residence or building as a result of a plugged sewer system.
• Valve flapper seals the system, blocking reverse flow.
• The unique design allows accessibility to the flapper, thus eliminating the need for vaults or manholes, it is direct buried using a riser pipe and standard clean-out plug.
• Backwater valves are building code required when the flood level rim of the lowest fixture in a structure is below the first upstream manhole cover. They must be accessible for inspection and service.
• Complies with the requirements of IAPMO/UPC, ICC, IPC & CSA Standards
• Easy to perform maintenance & inspection from ground level
• Capable of handling back pressure up to 75 psi

Pre-Installation

• Slide Upper Collar through Outer Riser Pipe. If collar does not slide freely through pipe, check to see if pipe is “out-of-round”. If so, replace Outer Riser Pipe.
• Backwater valves require adequate drop between the flood rim of the lowest fixture and burial depth of the valve in order to function properly. We recommend a minimum slope of 1/4” per foot or as recommended by the UPC and IPC codes.
• Additional PVC bushings are enclosed for use if needed. Discard if not used.

Outer Riser Installation

• At proper depth, install the Clean Check Valve Body between the building and the sewer lateral, with the “FLOW” arrow of the Valve Body pointing downstream away from the building.
• Rotate the Valve Body until the opening is facing directly upward. A level may be used across the top of the Valve Body to verify horizontal positioning.
• Cut the Outer Riser Pipe to the required length. Cement and insert while keeping the inside of the body clean of debris. CAUTION: Be certain that excess solvent cement has not impeded proper seating of the Flapper Assembly or the proper seating of the flapper sealing surface of the Valve Body.

Inner Riser Installation

• Cut the Inner Riser Pipe to a length (3-1/2”) shorter than the Outer Riser Pipe.
• Cement the Flapper Assembly to one end of the Inner Riser Pipe.
• Cement the Upper Collar to the other end of the Inner Riser Pipe, while aligning the center of the Finger Hole with the center of the Flapper on the opposite end.
• When cement is dry, loosen the thumb screw in the Upper Collar and slide the Inner Riser Assembly – Flapper Assembly first – into the Outer Riser Assembly with the flat sealing side of the Flapper facing the inlet side of te Valve Body. Lower the Inner Riser Assembly into the seating area of the Valve Body, making certain that the Thumb Screw is inside the inside wall of the Outer Riser Pipe and NOT on the resting on the top edge. Seat the Flapper Assembly by rotating as necessary until it locks in place. Visually inspect that the Flapper Assembly is installed correctly.
• IMPORTANT: Prior to installation of the Threaded Adaptor & Plug (with the Inner Riser Assembly properly installed) cut a reference notch into the Outer Riser Pipe. This saw cut notch should be aligned with the molded Notch in the Upper Collar. For future removal, alignment of the notches will quickly indicate that the flapper is seated correctly.
• IMPORTANT: Tighten the ¼” Stainless Steel Thumb Screw until it seats snugly against the Inner Riser Pipe, fixing the Inner Riser Assembly in place.
• Cement the Threaded Adapter to the Outer Riser Pipe riser and screw the Threaded Plug into the Threaded Adapter to complete installation.

6" Clean Check PVC Rebuild Kit

Features

• No manhole required
• Installs discretely outside - up to 12' below ground level
• Above ground outdoor maintenance accessibility eliminates hidden access indoor applications, and the sewer odor and mess of indoor maintenance
• Complies with UPC, IPC and IRC codes & ASME and ICC-ES standards

Pre-Installation

• Slide Upper Collar through Outer Riser Pipe. If collar does not slide freely through pipe, check to see if pipe is “out-of-round”. If so, replace Outer Riser Pipe.
• Backwater valves require adequate drop between the flood rim of the lowest fixture and burial depth of the valve in order to function properly. We recommend a minimum slope of 1/4” per foot or as recommended by the UPC and IPC codes.
• Additional PVC bushings are enclosed for use if needed. Discard if not used.

Outer Riser Installation

• At proper depth, install the Clean Check Valve Body between the building and the sewer lateral, with the “FLOW” arrow of the Valve Body pointing downstream away from the building.
• Rotate the Valve Body until the opening is facing directly upward. A level may be used across the top of the Valve Body to verify horizontal positioning.
• Cut the Outer Riser Pipe to the required length. Cement and insert while keeping the inside of the body clean of debris. CAUTION: Be certain that excess solvent cement has not impeded proper seating of the Flapper Assembly or the proper seating of the flapper sealing surface of the Valve Body.

Inner Riser Installation

• Cut the Inner Riser Pipe to a length (3-1/2”) shorter than the Outer Riser Pipe.
• Cement the Flapper Assembly to one end of the Inner Riser Pipe.
• Cement the Upper Collar to the other end of the Inner Riser Pipe, while aligning the center of the Finger Hole with the center of the Flapper on the opposite end.
• When cement is dry, loosen the thumb screw in the Upper Collar and slide the Inner Riser Assembly – Flapper Assembly first – into the Outer Riser Assembly with the flat sealing side of the Flapper facing the inlet side of te Valve Body. Lower the Inner Riser Assembly into the seating area of the Valve Body, making certain that the Thumb Screw is inside the inside wall of the Outer Riser Pipe and NOT on the resting on the top edge. Seat the Flapper Assembly by rotating as necessary until it locks in place. Visually inspect that the Flapper Assembly is installed correctly.
• IMPORTANT: Prior to installation of the Threaded Adaptor & Plug (with the Inner Riser Assembly properly installed) cut a reference notch into the Outer Riser Pipe. This saw cut notch should be aligned with the molded Notch in the Upper Collar. For future removal, alignment of the notches will quickly indicate that the flapper is seated correctly.
• IMPORTANT: Tighten the ¼” Stainless Steel Thumb Screw until it seats snugly against the Inner Riser Pipe, fixing the Inner Riser Assembly in place.
• Cement the Threaded Adapter to the Outer Riser Pipe riser and screw the Threaded Plug into the Threaded Adapter to complete installation.