Oatey 43905 ABS Backwater Valve， 4-Inch<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Protects low areas or basements from backflow or waste from street sewers.</li><li>Elastomeric seal in quick action flapper ensures a water tight seal.</li><li>Threaded access cap incorporates a neoprene seal for positive sealing and can be tightened or removed by hand.</li><li>Valve hub fits DWV pipe and can be adapted for sewer and drain pipe.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31Uif2pg4gL.jpg" noproxy>