By NORMA Group

ABS Backwater Valve, 4 in., Black

SKU:

475

NDS Black 4 in. ABS Backwater Valve (NDS 475) prevents street sewer waste from backflowing into basements or low areas

The top detachable threaded access cap with neoprene gasket provides a positive seal on the NDS Black 4 in. Backwater Valve (NDS 475)

The outlet end on the NDS Black 4 in. ABS Backwater Valve (NDS 475)

Side view of the NDS Black 4 in. ABS Backwater Valve (NDS 475) shows the water flow direction with arrow

The quick action flapper allows unrestricted uni-directional flow and includes a elastomeric gasket in the flapper for a watertight seal on the NDS Black 4 in. ABS Backwater Valve (NDS 475)

The flapper open inside of the NDS Black 4 in. ABS Backwater Valve (NDS 475) controls the flow of water

The flapper closed inside of the NDS Black 4 in. ABS Backwater Valve (NDS 475) controls the flow of water

Closeup of the inlet end of the NDS Black 4 in. ABS Backwater Valve (NDS 475)

Closeup of the lower outlet end of the NDS Black 4 in. Backwater Valve (NDS 475)

Closeup of the flapper attachment inside the NDS Black 4 in. Backwater Valve (NDS 475)

Closeup of the elastomeric gasket in the flapper which creates a watertight seal on the NDS Black 4 in. ABS Backwater Valve (NDS 475) and is replaceable

Closeup of the outside part of the NDS 4 in. Backwater Valve with stamped arrow showing the direction in which the water will flow (NDS 475)

Prevent street sewer waste from backflowing into basements or low areas with the ABS 4 in. Backwater Valve. 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. 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 is made of ABS.

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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
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