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. Oatey products have earned the trust of plumbing professionals for over 100 years.