Oatey 43790 ABS Saddle Tee Kit, 4-Inch x 2-Inch For tapping into a 3"" or 4"" Sch. 40 DWV line. Saddle is solvent welded to the existing line and secured with metal V-bolts, washers and nuts provided in the kit. The tee accepts the incoming line inside the socket, or joins with a Sch. 40 DWV fitting. Protects low areas or basements from backflow or waste from street sewers Elastomeric seal in quick action flapper ensures a water tight seal Threaded access cap incorporates a neoprene seal for positive sealing and can be tightened or removed by hand Valve hub fits DWV pipe and can be adapted for sewer and drain pipe