KINGSTON KITCHEN & BATH INSTALLATION INSTRUCTIONS Universal Tub Drain Replacement Trim Kit Stopper Plunger Installation: 1. Thread existing stop plunger (lift & turn or foot stopper) from strainer. 2. Thread knob from new stop plunger. Then put new stop plunger on strainer. 3. Thread the stem into strainer by using Flat-Head screw driver. ( Either 5/16" or 3/8" thread) 4. Thread the knob into the stop plunger.