- Protects low areas or basements from the backflow of waste from a street sewer
- The quick-action flapper allows an unrestricted, unidirectional flow, and the flapper's elastomeric gasket ensures a watertight seal
- Designed for use in the installation of non-pressurized drainage and sewer piping systems
- Abs construction is durable, lightweight, economical and resistant to corrosion and chemicals
- Hub outlets are suitable for use with DWV pipe; May be adapted to sewer and drain pipe with NDS DWV to sewer drain adapters
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