NDS 375 ABS Backwater Valve， 3-Inch， Black<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Protects low areas or basements from the backflow of waste from a street sewer</li><li>The quick-action flapper allows an unrestricted， unidirectional flow， and the flapper's elastomeric gasket ensures a watertight seal</li><li>Designed for use in the installation of non-pressurized drainage and sewer piping systems</li><li>Abs construction is durable， lightweight， economical and resistant to corrosion and chemicals</li><li>Hub outlets are suitable for use with DWV pipe; May be adapted to sewer and drain pipe with NDS DWV to sewer drain adapters</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41gEEy9W9qL.jpg" noproxy>