How to Install Composite Granite Sinks

Turn the new sink over so you are looking at the bottom side of the sink. Place a line of silicone caulking along the outer edge of the sink's rim.

Lift the sink and turn it over. Have someone help you if the sink is too heavy for you to lift on your own. Place the sink into the opening in the counter where your old sink was. The side of the sink with the faucet holes should be the side farthest from you. Press down on the sink to make a seal with the caulking. Wipe away any caulking that squishes out onto the counter.

Install the sink strainer into the bottom of the sink. Run a line of caulking along the bottom of the strainer flange and then place the strainer into the hole in the drain opening of your sink. Press down on the strainer to form a seal.

Place the large rubber washer over the strainer on the underside of the sink. Screw on the large lock nut to hold the strainer in place. Tighten the lock nut with a pair of channel-type pliers. The rubber washer and lock nut come with your new strainer.

Install an 8- to 12-inch length of PVC pipe to the strainer. The length depends on how much space you have under your sink. Slide a plastic slip nut onto the pipe and then an insert washer on the end that will fit against the strainer. Push the washer onto the end of the strainer and tighten the slip nut by hand to secure the pipe in place.

Attach the trap to the pipe running out of the strainer using another washer and slip nut. Attach a length of piping to the trap.This last piece of piping needs to be long enough to run to your sewer system drain. You can also use a length of flexible pipe for this end piece.

Install your faucet. Attach it with the hardware that was included in the package. Attachment varies depending on the type of faucet you have. Run the hoses to your supply lines and attach them.

Go over all the nuts with your pliers to ensure they are tightened. Turn the water on part way to check for any leaks. If you find any leaks, turn the water off and re-attach and tighten the nuts and fittings.