Leaking Pipe Under Bathroom Sink

A leaky pipe under the bathroom sink is a common household problem that can cause water damage and lead to costly repairs. Fortunately, it's usually an easy problem to fix with the right tools and materials. Here's a step-by-step guide to help you identify and repair a leaking pipe under your bathroom sink:

1. Identify the Leak

The first step is to identify the source of the leak. Check the following areas:

Faucet handles and base
Supply lines (hot and cold water lines)
Drainpipes
P-trap (the U-shaped pipe under the sink)

Once you've identified the leak, gather the necessary tools and materials.

2. Tools and Materials You'll Need

Adjustable wrench
Plumber's tape
Replacement washers or O-rings (if needed)
Bucket or bowl
Rags or towels
Flashlight (optional)

3. Shut Off the Water Supply

Locate the shutoff valves under the sink and turn them clockwise to shut off the water supply. If there are no shutoff valves, you'll need to turn off the main water valve for your home.

4. Drain the Sink

Open the faucet to drain any remaining water from the sink and pipes.

5. Repair the Leak

Once the water is turned off and the sink is drained, you can repair the leak:

Faucet handles: If the leak is coming from the faucet handles, you may need to replace the washers or O-rings. Tighten the packing nut or replace the entire handle if necessary.
Supply lines: If the leak is coming from the supply lines, check for loose connections. Tighten the connections with an adjustable wrench. You may also need to wrap the threads with plumber's tape to create a seal.
Drainpipes: If the leak is coming from the drainpipes, check for loose connections. Tighten the connections or replace the drainpipes if necessary.
P-trap: If the leak is coming from the P-trap, remove the slip nuts and clean the trap. Reinstall the trap and tighten the slip nuts.

6. Turn on the Water Supply and Check for Leaks

Once the repair is complete, turn on the water supply and check for leaks. If the leak has stopped, you're done.

Tips

If you're not comfortable working on plumbing, it's best to call a licensed plumber for assistance.
If the leak is severe or you can't identify the source, turn off the main water valve and call a plumber immediately.
Regularly inspect your bathroom sink and pipes for signs of leaks to prevent costly repairs in the future.