Installing Bathroom Sink Drain Plumbing

Replacing the drain plumbing in a bathroom sink is a relatively simple task that can be completed in a few hours with the right tools and materials. Here's a step-by-step guide to help you do it:

Tools and Materials You'll Need:

Adjustable wrench
Pliers
Bucket
New drain assembly
Plumber's putty
Teflon tape

Step 1: Turn Off the Water Supply

Locate the water supply valves under the sink and turn them off clockwise. Open the faucet to release any remaining water in the lines.

Step 2: Remove the Old Drain Assembly

Place the bucket under the sink to catch any water that may leak out. Use the adjustable wrench to loosen the slip nut that connects the drain assembly to the sink. Once loose, carefully pull the old drain assembly out of the sink.

Step 3: Clean the Drain Hole

Use a cloth to clean any debris or old putty from the drain hole in the sink. This will ensure a good seal for the new drain assembly.

Step 4: Apply Plumber's Putty

Roll out a small piece of plumber's putty and form it into a rope. Apply the putty around the base of the new drain assembly, where it will meet the sink.

Step 5: Install the New Drain Assembly

Insert the new drain assembly into the drain hole and hand-tighten it. Use the adjustable wrench to further tighten the slip nut, but be careful not to overtighten.

Step 6: Connect the Drain Pipe

Wrap a few layers of Teflon tape around the threads of the drain pipe that connects to the drain assembly. Screw the pipe into the assembly and hand-tighten it. Use the pliers to further tighten the connection.

Step 7: Turn On the Water Supply

Turn the water supply valves back on and check for any leaks. If you notice any leaks, tighten the slip nut or drain pipe connection as needed.

Additional Tips:

If your sink has a garbage disposal, you'll need to disconnect the disposal from the drain assembly before removing the old assembly.
Use a flashlight to inspect the underside of the sink for any leaks or potential problems.
If you encounter any difficulties during the installation process, don't hesitate to consult a professional plumber.

By following these steps, you should be able to replace the drain plumbing in your bathroom sink successfully. Remember to work carefully and methodically, and take your time to ensure a leak-free installation.