Step 2 · Assemble Faucet and Drain on Basin
Before mounting the sink, install the faucet and drain assembly. Place the new sink basin upside down on a soft surface like a towel or cardboard to prevent scratching. Follow the faucet manufacturer's instructions. Typically, you will insert the faucet tailpieces through the holes in the sink basin and secure them from underneath using the provided nuts and washers, tightening with a basin wrench. For the drain, apply a ring of plumber's putty or a silicone bead under the drain flange. Insert the drain body through the drain hole from the top of the sink. From underneath, install the gasket and retaining nut onto the drain body and tighten it securely. Attach the pop-up drain linkage if included. Clean off any excess plumber's putty from the basin.