How to Remove and Install a Kitchen Sink Strainer
By: Danny Lipford
Step #6: Reattach Drain Pipe Tailpiece
Slide the nut on the tailpiece drain pipe, and screw it onto the bottom of the sink strainer with the nylon washer (flange facing toward the tailpiece) between the two.
Tighten the tailpiece nut up with a pipe wrench (don’t over tighten!).