How To Fix Leak Under Bathroom Sink

A leak under the bathroom sink can be a frustrating and inconvenient problem. Not only can it waste water and increase your utility bills, but it can also lead to mold and mildew growth, which can pose a health hazard. Fortunately, fixing a leak under the bathroom sink is often a relatively simple task that can be completed in a few hours with the right tools and materials.

Step 1: Gather Your Tools and Materials

Before you begin, you will need to gather the following tools and materials:

Adjustable wrench or pliers
Phillips head screwdriver
Flat head screwdriver
Bucket or bowl
Rags or towels
New faucet washer (if necessary)
New supply line (if necessary)
Plumber's putty (if necessary)

Step 2: Turn Off the Water Supply

Once you have gathered your tools and materials, the first step is to turn off the water supply to the sink. There are usually two shut-off valves located under the sink, one for the hot water and one for the cold water. Turn both valves clockwise to turn off the water.

Step 3: Identify the Source of the Leak

Now that the water is turned off, you can identify the source of the leak. Common sources of leaks include the faucet, the supply lines, the drain, and the P-trap. Inspect each component carefully for any signs of leaks, such as dripping water or wetness.

Step 4: Fix the Leak

Once you have identified the source of the leak, you can begin to fix it. Here are some common leak repairs:

Faucet leak:

Remove the faucet aerator and clean it.
Replace the faucet washer.
Tighten the faucet packing nut.
Replace the faucet if necessary.

Supply line leak:

Tighten the nuts on the supply lines.
Replace the supply lines if they are damaged.

Drain leak:

Tighten the drain flange.
Apply plumber's putty to the drain flange and retighten it.
Replace the drain gasket.

P-trap leak:

Tighten the nuts on the P-trap.
Apply plumber's putty to the P-trap and retighten it.
Replace the P-trap if necessary.

Step 5: Turn on the Water Supply

Once you have fixed the leak, turn on the water supply and check for any leaks. If there are no leaks, you have successfully fixed the leak under the bathroom sink.

Tips

Here are a few tips for fixing a leak under the bathroom sink:

If you are not comfortable working on plumbing, it is always best to call a licensed plumber.
Make sure to turn off the water supply before starting any repairs.
Use a flashlight to inspect for leaks in dark areas.
If you are replacing any parts, make sure to use new parts that are compatible with your sink.
Test the sink thoroughly after making any repairs to ensure that the leak has been fixed.