Product Description Oatey Saddle Tee Kits are designed for tapping into a 3 in. or 4 in. Schedule 40 DWV line. Solvent weld the included saddle tee to the existing pipe line and secure with included metal V-bolts, washers and nuts. The tee accepts the incoming line inside the socket, or joins with a Schedule 40 DWV fitting. This gasket is used with Oatey Saddle Tee Kits for tapping into cast iron. Oatey products have earned the trust of plumbing professionals for over 100 years. From the Manufacturer Oatey products can be found in residential and commercial applications and have achieved excellent brand name recognition with consumers. All products are backed with the highest quality technical and customer support programs in the industry