Attach the Drain Tailpiece
Fit the new drain tailpiece onto the bottom end of the strainer basket, and secure it with the provided washer and slip nut. Tighten the nut with pliers.
If you have a dishwasher, you need to use a flanged branch tailpiece, which has an additional inlet for the dishwasher drain hose. Fit the drain hose onto the tailpiece inlet, and secure it with the hose clamp.
For some extra protection against leaks, place a few pinches of putty inside the nut between the tailpiece washer and basket strainer.