My Bathroom Sink Leaks at the Bottom

Leaking bathroom sinks may cause damage in cabinets and floors.

Leaky sinks waste water and ruin floorboards. A slow leak may go unnoticed for a long period of time, creating an environment for mold and bacterial growth. You can fix most minor leaks at home without paying for professional services.

Causes

Bathroom sinks often leak due to loose or old pipes. Pipes can leak if excessive dirt or debris clogs the pipe or seeps into its threads. The sink or pipes could be cracked, or the seal may require replacement. Improperly sealed faucets also cause leaks.

Identification

Turn off the water to the faucet and thoroughly dry the sink basin, the pipes and the area under the sink. Turn on the cold water and let it run while watching and feeling for the leak. Check the base of the sink, each of the pipe connections, the faucet handles and the hot and cold water pipes. If no leak is detected, repeat the process with the hot water running.

Solution

Turn off the water from the pipe valve. Loosen the pipes and clean out any visible debris, especially around the threads. Apply plumber's tape to the threads and reattach the pipes. Tighten just until they are snug; do not over-tighten. If the pipes are visibly cracked or continue to leak, you may need to replace the pipe. Consult with a professional plumber for larger issues.

Prevention

Keep the bathroom sink and pipes free from clogs and accumulated debris and flush them monthly with vinegar. Routinely check pipe fittings to ensure that they have not come loose. Check for visual signs of corrosion, cracks and old age. Replace worn pipes immediately to prevent larger problems.

References

• "Vinegar: 1001 Practical Household Uses"; L&K Designs; 2007
• "Dare to Repair"; Julie Sussman and Stephanie Glakas-Tenet; 2005
• "Ultimate Guide to Home Repair and Improvement"; Creative Homeowner; 2006