Identify the source of the leak
The first step in fixing a leaky bathroom sink is to identify where the leak is coming from. Check the sink basin, drain, and faucet for any signs of water. Sometimes the leak may be hard to spot, so you can put some dry tissue paper around the base of the sink basin and faucet to see if it gets wet. Once you have identified the source of the leak, you can move on to fixing it.
Tighten the connections
In many cases, a leaky bathroom sink can be fixed by simply tightening the connections. This includes the nuts that hold the faucet in place and the connections between the various pipes under the sink. Use a wrench to tighten these connections carefully, taking care not to over-tighten and damage the pipes or fittings. Tightening the connections may be enough to fix the leak.
Replace the damaged parts
If tightening the connections doesn’t fix the leak, you may need to replace some of the damaged parts. This could include the washer in the faucet, the O-ring, or the gasket in the drain. You can purchase replacement parts from a hardware store or plumbing supply store. Be sure to take the damaged parts with you to ensure you get the correct replacement part.
Hire a professional plumber
If you are unable to fix a leaky bathroom sink yourself, or if the plumbing is old or complicated, it may be best to hire a professional plumber. A plumber can quickly identify the source of the leak and make the necessary repairs, ensuring your sink is leak-free and functioning properly. Be sure to choose a reputable and licensed plumber to do the job.
Take preventative measures
To prevent future leaks in your bathroom sink, take some preventative measures. This includes making sure the connections are tight, not over-tightening the faucet handles, and avoiding pouring harsh chemicals or substances down the drain that could corrode the pipes. Regularly clean the sink and drain to prevent build-up and debris from causing leaks.