Install a One-Piece Bathroom Sink and Countertop Part 1

What You'll Need
Sink and countertop
Drain parts

Installing a bathroom sink and countertop in your bathroom can be a very difficult job, as it is not always easy to position the countertop correctly for the sink. In Part 1 of this guide, you will learn how to set up the sink and countertop, attach the faucet and the drain flange and then install the drain tailpieces. Even if you have no plumbing skills, you should be able to get this job done in only a few hours by following some basic instructions.

Step 1 - Mount the Sink and Countertop

The first step in installing a bathroom sink and countertop is to ensure that the pieces are fully supported on sawhorses before you begin to add the fittings. A sawhorse is a cutting table, usually formed of 2  square frames connected at the top. The top has a small, thin surface, and the legs can be extended to suit the needs of the person working on it. Using 2 of these sawhorses, position the sink and countertop next to the space where they will be fitted. Make sure that the sawhorses are on even flooring, and don't allow any movement of the supports once the countertop is mounted upon it.

Step 2 - Attach the Faucet

Your sink may already have pre-drilled faucet holes, which is a good idea if you wish to avoid struggling with drilling your sink. Place a layer of putty or caulk around the edge of the sink, and then hold it into position as carefully as you can. Keep the faucet in place while you screw it onto the back of the sink. Allow the caulk to dry completely before proceeding. Once the faucet is dry, you can then add the supply lines which will connect to the back of the sink. Secure these using the mounting nuts.

Step 3 - Attach the Drain

Once you have finished with the faucet, apply some more putty to the drain flange, and insert it into the hole in the bottom of the sink. you should see the terminal of the flange sticking out of the bottom of the sink from beneath. Ensure that the drain flange fits properly before continuing. You should then add the tailpiece to the drain, securing it with the wrench.

Step 4 - Add the Plumbing

Once the drain has been installed, you can then add the rest of the plumbing. Connect the pipe trap—either a P or an S trap—to the tailpiece. Use putty to keep the pipes in place, and tighten the bolts using the washer. Ensure that all the parts of the drain pipe system are tightly connected to each other before proceeding to the rest of the build.