Install Drain Pipe Bathroom Sink

Replacing the drain pipe underneath a bathroom sink is a relatively simple plumbing task that can be completed in a few hours. By following these step-by-step instructions, you can save yourself the cost of a plumber and ensure that your sink is properly drained.

Tools and Materials:

Adjustable wrench
Basin wrench
Plumber's putty
New drain pipe
Bucket
Rags

Step 1: Turn Off the Water Supply

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

Step 2: Disconnect the Drain Pipe

Use an adjustable wrench to loosen the slip nuts that connect the drain pipe to the sink and trap. Remove the old drain pipe by carefully pulling it down.

Step 3: Clean the Drain Opening

Use a rag to clean any debris or old plumber's putty from the drain opening in the sink and trap. This will ensure a good seal for the new drain pipe.

Step 4: Apply Plumber's Putty

Roll a small amount of plumber's putty into a snake and press it around the base of the new drain pipe. This will help create a watertight seal.

Step 5: Install the New Drain Pipe

Insert the new drain pipe into the drain opening in the sink and trap. Hand-tighten the slip nuts until they are snug.

Step 6: Tighten the Connections

Use an adjustable wrench to fully tighten the slip nuts. Ensure that they are secure but avoid overtightening, which can damage the pipe or sink.

Step 7: Turn On the Water Supply

Turn on the water supply valves and check for leaks. If you see any leaks, tighten the slip nuts further or reapply plumber's putty.

Step 8: Clean Up

Use a rag to clean up any excess plumber's putty or water. Your bathroom sink should now be properly drained.