What Causes Odor From Bathroom Sink

By | September 1, 2021

What Causes Odor From Bathroom Sink?

Bad smells coming from your bathroom sink can be unpleasant and embarrassing. But what exactly causes these odors, and how can you get rid of them? Here are the most common reasons why your bathroom sink smells, as well as some tips on how to fix the problem.

1. Clogged Drain

One of the most common causes of bathroom sink odor is a clogged drain. When food, hair, and other debris accumulate in the drain, it can create a breeding ground for bacteria. These bacteria produce gases that can cause your sink to smell bad. To fix this problem, try cleaning the drain with a drain cleaner or a mixture of baking soda and vinegar.

2. P-Trap Odor

The P-trap is a U-shaped pipe under your sink that prevents sewer gases from entering your home. However, if the P-trap is not properly sealed, it can allow sewer gases to escape into your bathroom. This can cause your sink to smell like sewage. To fix this problem, check the P-trap for leaks and tighten any loose nuts or bolts.

3. Old or Corroded Pipes

If your bathroom sink is old, the pipes may be corroded or damaged. This can allow water to leak out of the pipes and create a damp environment that is ideal for bacteria growth. Bacteria can also build up inside the pipes and cause them to smell bad. To fix this problem, you may need to replace the old or corroded pipes.

4. Mold and Mildew

Mold and mildew are types of fungi that can thrive in damp environments. If your bathroom is humid, mold and mildew can grow on the walls, ceiling, or floor. This can cause your bathroom to smell musty or moldy. To fix this problem, you need to remove the mold and mildew and reduce the humidity in your bathroom.

5. Dry Drain

A dry drain can also cause your bathroom sink to smell bad. When the drain is not used regularly, the water in the P-trap can evaporate. This leaves the P-trap open to sewer gases, which can then escape into your bathroom. To fix this problem, simply run water down the drain regularly to keep the P-trap full.


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