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PVC Backwater Valve with Riser and Cover, 4 in., White

SKU: 475PR

Closeup of the collar locked in place on the valve on the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR)
Unassembled view showing all parts in the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR)
The flapper opened inside of the NDS White 4 in. PVC Backwater Valve (NDS 475P) controls the flow of water
Closeup of the outside part of the NDS White PVC 4 in. Backwater Valve with stamped arrow showing the direction in which the water will flow (NDS 475P)
The cover on the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR) fits on the access riser which can be cut to desired length
Close up of the inlet end of the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR) which fits DWV pipe
The flapper closed inside of the NDS White 4 in. PVC Backwater Valve (NDS 475P) controls the flow of water
Closeup of the elastomeric gasket in the flapper which creates a watertight seal on the NDS White 4 in. PVC Backwater Valve (NDS 475P) and is replaceable
Closeup of the outlet end of the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR) which fits DWV pipe
The locking nub close to the access cap will lock into the collar and riser on the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR)
Exploded view of the NDS 4 in. White PVC Backwater Valve with Riser and Cover showing lid, riser, BWV pipe extension collar, cap, cap O-Ring, back water valve (NDS 475PR) and how it will be assembled
Alternate view showing the inlet end on the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR) which fits DWV pipe
The collar secures the access riser to the access cap on the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR)
Alternate view showing the outlet end on the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR) which fits DWV pipe
The NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR) protects basements or low areas from street sewer waste backflow
Closeup of the collar locked in place on the valve on the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR)
Unassembled view showing all parts in the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR)
The flapper opened inside of the NDS White 4 in. PVC Backwater Valve (NDS 475P) controls the flow of water
Closeup of the outside part of the NDS White PVC 4 in. Backwater Valve with stamped arrow showing the direction in which the water will flow (NDS 475P)
The cover on the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR) fits on the access riser which can be cut to desired length
Close up of the inlet end of the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR) which fits DWV pipe
The flapper closed inside of the NDS White 4 in. PVC Backwater Valve (NDS 475P) controls the flow of water
Closeup of the elastomeric gasket in the flapper which creates a watertight seal on the NDS White 4 in. PVC Backwater Valve (NDS 475P) and is replaceable
Closeup of the outlet end of the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR) which fits DWV pipe
The locking nub close to the access cap will lock into the collar and riser on the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR)
Exploded view of the NDS 4 in. White PVC Backwater Valve with Riser and Cover showing lid, riser, BWV pipe extension collar, cap, cap O-Ring, back water valve (NDS 475PR) and how it will be assembled
Alternate view showing the inlet end on the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR) which fits DWV pipe
The collar secures the access riser to the access cap on the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR)
Alternate view showing the outlet end on the NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR) which fits DWV pipe
The NDS 4 in. White PVC Backwater Valve with Riser and Cover (NDS 475PR) protects basements or low areas from street sewer waste backflow

Use the PVC 4 in. Backwater Valve with Riser and Cover to protect basements or low areas from street sewer waste backflow. The backwater valve is lightweight and easy to install. The quick action flapper allows unrestricted uni-directional flow. Elastomeric gasket in the flapper ensures a watertight seal. Flapper can be easily removed and replaced if required. Access cap neoprene gasket provides a positive seal. Access riser with cover offers a simple, economical access to the valve for inspection and maintenance. The riser may be cut to desired length. Valve hub outlets fit 4 in. DWV pipe. Horizontal installation required, with arrows on top of the valve hub pointing in the direction of the flow of water. This backwater valve is a chemically resistant alternative to cast iron valves. Durable backwater valve, riser, and cover are made of PVC plastic.

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Applications:

  • Directs flow one-way through pipe when flapper opens, allowing water through and preventing backflow of waste from street sewers; access riser with cover offers access to valve for inspection and maintenance
  • Use for low basement areas and sewage system installations; works with most DWV pipe to transport waste and prevent backflow in pressurized systems
  • As part of a complete flow management system, the Backwater Valve connects to 4 in. DWV pipe and other system components to allow water to flow through

Features:

  • Valve is made of PVC material and is chemically resistant
  • Access riser can be cut to desired length; comes with cover
  • Flapper has an elastomeric gasket for a watertight seal
  • Threaded access cap has a neoprene gasket
  • Backwater valve is lightweight, easy to install, and cost effective

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