- 1). Prepare the site for the new vanity by removing the old sink after turning off the water supply and disconnecting the drain and water pipes.
- 2). Waterproof the dresser with an exterior-grade coating, either paint or polyurethane. Give the coating plenty of time to dry before you install the sink. Remove the drawers if they will interfere with the sink placement and leave only their faceplate glued on the front. Open or remove the doors for easier sink installation.
- 3). Set the dresser in place where you plan on installing it. Mark the plumbing positions with a pencil or chalk. Pull the dresser away from the wall and cut holes with the hole saw bit in the back where the pipes and drain will come through. Replace the dresser, inserting the pipes and drain in the proper place.
- 4). Set the level on the top and use wood shims to make it perfectly straight from side to side and from front to back. Cut off the edges of the shims that stick out past the bottom of the dresser. Screw the dresser to the wall and into the studs with the wood screws for secure placement.
- 5). Set the sink on top of the dresser, or the installation template that came with it if it is a new sink. Pencil in the outline of the hole where the sink should fit. Use a jigsaw to cut it out, being careful not to cut out too much.
- 6). Assemble the sink hardware and top section of the drain before you install it in the dresser. Tighten all the plumbing intersections, using Teflon tape on the pipes and the plumber's putty under the drain plate. Hire a plumber if you are unsure of proper plumbing procedures.
- 7). Apply a bead of silicone caulk around the underside perimeter of the sink where it will rest on the dresser. Flip the sink over and set it in place. Smooth out the extra caulk with your finger so that it has a smooth and straight edge all the way around the sink.
- 8). Connect the water-supply pipes to the faucets and the drain assembly to the sewer line. Test the connections to make sure there are no leaks by turning on the separate faucets and watching under the sink. Close the front doors and enjoy your beautiful vanity.
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