How To Replace Bathroom Sink

Replacing a bathroom sink is a relatively simple plumbing project that can be completed in a few hours. By following these step-by-step instructions, you can save yourself the cost of hiring a plumber and have a new sink installed in no time.

Tools and Materials You'll Need:

New bathroom sink
Wrench
Plumber's putty
Tub and tile caulk
Utility knife
Bucket
Flashlight (optional)

Step 1: Turn Off the Water Supply

The first step is to turn off the water supply to the sink. There will be two shut-off valves under the sink, one for the hot water and one for the cold water. Turn both valves clockwise to shut off the water.

Step 2: Disconnect the Water Supply Lines

Once the water supply is turned off, you can disconnect the water supply lines from the sink. Use a wrench to loosen the nuts that hold the lines in place. Be careful not to overtighten the nuts, as this can damage the lines.

Step 3: Disconnect the Drain Line

Next, you need to disconnect the drain line from the sink. This is usually a flexible plastic pipe that is attached to the bottom of the sink with a slip nut. Loosen the slip nut with your hands and pull the drain line off of the sink.

Step 4: Remove the Old Sink

Now, you can remove the old sink. If the sink is sealed with caulk, use a utility knife to cut through the caulk. Then, lift the sink up and off of the vanity. Be careful not to damage the vanity or the countertop.

Step 5: Clean the Vanity

Once the old sink is removed, take a few minutes to clean the vanity. Wipe down the surface with a damp cloth to remove any dirt or debris.

Step 6: Apply Plumber's Putty

Before installing the new sink, you need to apply plumber's putty to the rim of the sink. Plumber's putty is a sticky substance that will help to seal the sink to the vanity and prevent leaks. Roll out a rope of plumber's putty and press it onto the rim of the sink, making sure to cover the entire surface.

Step 7: Set the New Sink

Now, you can set the new sink in place on the vanity. Carefully lower the sink onto the plumber's putty, making sure to align the drain hole with the drain in the vanity. Press down on the sink to seat it firmly.

Step 8: Reconnect the Drain Line

Next, you need to reconnect the drain line to the sink. Slide the slip nut onto the drain line and tighten it with your hands. Be careful not to overtighten the slip nut, as this can damage the drain line.

Step 9: Reconnect the Water Supply Lines

Now, you can reconnect the water supply lines to the sink. Hand-tighten the nuts that hold the lines in place. Be careful not to overtighten the nuts, as this can damage the lines.

Step 10: Turn On the Water Supply

Once the water supply lines are reconnected, you can turn on the water supply. Open the shut-off valves under the sink and check for leaks. If you see any leaks, tighten the nuts on the water supply lines until the leaks stop.

Step 11: Caulk Around the Sink

To finish the installation, you need to caulk around the sink. Apply a bead of tub and tile caulk around the edge of the sink, where it meets the vanity. Smooth the caulk with your finger or a damp cloth.