How To Fix Leak Under Bathroom Sink

A leak under the bathroom sink can be a frustrating and potentially costly problem. If not addressed promptly, it can lead to water damage, mold growth, and even structural damage. Fortunately, fixing a leak under the bathroom sink is a relatively simple task that can be completed in a few hours with the right tools and materials.

Step 1: Identify the Source of the Leak

Before you can fix the leak, you need to identify its source. Check the following areas for signs of water damage or dripping:

Faucet base
Drainpipes
Supply lines
P-trap

Once you have identified the source of the leak, you can proceed with the appropriate repair.

Step 2: Gather the Necessary Tools and Materials

Depending on the source of the leak, you may need the following tools and materials:

Wrench
Pliers
Screwdriver
Plumber's putty
Teflon tape
Replacement parts (e.g., washers, gaskets)

Step 3: Turn Off the Water Supply

Before you start any repairs, it is important to turn off the water supply to the bathroom sink. This will prevent water from leaking out and causing further damage.

Step 4: Remove the Faucet Handle

If the leak is coming from the faucet base, you will need to remove the faucet handle to access the washer. Use a screwdriver to remove the handle screw and pull the handle straight up.

Step 5: Replace the Washer

Once the faucet handle is removed, you will need to replace the washer. Use pliers to remove the old washer and replace it with a new one. Make sure that the new washer is the correct size and type for your faucet.

Step 6: Reinstall the Faucet Handle

Once the new washer is in place, you can reinstall the faucet handle. Align the handle with the screw hole and push it down until it is snug. Tighten the handle screw using a screwdriver.

Step 7: Check for Leaks

Turn the water supply back on and check for leaks. If the leak has been fixed, you will not see any more water dripping from the faucet.

Step 8: Fix Leaks from Drainpipes

If the leak is coming from the drainpipes, you will need to tighten the connections. Use a wrench to tighten the nuts that hold the drainpipes in place. If the leak persists, you may need to replace the washers or gaskets.

Step 9: Fix Leaks from Supply Lines

If the leak is coming from the supply lines, you will need to replace the washers or gaskets. Use a wrench to loosen the nuts that hold the supply lines in place, and then remove the old washers or gaskets. Replace them with new ones and tighten the nuts.

Step 10: Fix Leaks from the P-trap

If the leak is coming from the P-trap, you may need to tighten the nuts that hold it in place. Use a wrench to tighten the nuts, and then check for leaks. If the leak persists, you may need to replace the P-trap.

Fixing a leak under the bathroom sink is a relatively simple task that can be completed in a few hours with the right tools and materials. By following the steps outlined in this guide, you can save yourself the cost of hiring a plumber and ensure that your bathroom sink is leak-free.