Step 6 · Insert and Seat the PVC Pipe
Apply plumber's grease or soapy water to the beveled end of the PVC pipe and to the inside surface of the installed donut gasket. Align the pipe with the center of the gasket. Using a firm, steady pushing and slight twisting motion, force the pipe into the gasket. The bevel should help guide it in. Push the pipe until it stops against the internal shoulder deep inside the hub. If it is difficult to push by hand, you can place a block of scrap wood on the other end of the pipe and gently tap it with a mallet to drive it home. Ensure the pipe is inserted straight and fully.