Step 4 · Clean the Drain Opening and Pipe

This is the step people usually slow down on. Go finger-tight first, then a quarter turn. No rush — replay the clip whenever it helps.

Once the old drain is removed, you must thoroughly clean the drain opening. Use a putty knife to carefully scrape away all the old plumber's putty, silicone, and any other residue from the top surface of the shower base around the hole. Then, use a rag to clean the surface where the new drain will sit. If needed, use a mild solvent like mineral spirits or denatured alcohol to remove stubborn residue. Also, clean the inside threads of the drain pipe below as best you can. Temporarily stuff a rag into the drain pipe to block sewer gases and prevent debris from falling in.