Step 2 · Install the Drain Fitting

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.

With the shower pan turned upside down on a protected surface (like cardboard), install the drain assembly. Follow the manufacturer's instructions, which typically specify using either plumber's putty or 100% silicone caulk. Apply a rope of plumber's putty or a bead of silicone around the pan's drain opening. Insert the top drain flange from inside the pan, pressing it firmly into the sealant. From the underside, place the rubber gasket and then the bottom flange (or compression nut). Tighten the assembly using channel-lock pliers or a dedicated drain wrench until snug. Clean away any excess putty or silicone that squeezes out.