Why Does My Bathroom Sink Stink When I Run Waterproof

Why Does My Bathroom Sink Stink When I Run Water?

A smelly bathroom sink is a common problem that can be caused by a variety of factors. If you've noticed a foul odor coming from your sink when you run water, don't ignore it. Addressing the issue promptly can help prevent more serious problems down the road.

Causes of a Smelly Bathroom Sink

The most common causes of a smelly bathroom sink include:

Clogged drain: Hair, soap scum, and other debris can accumulate in the drainpipe, creating a blockage that traps water and organic matter. As the organic matter decomposes, it releases foul odors.
P-trap: The P-trap is a U-shaped pipe located under the sink that traps water to create a seal and prevent sewer gases from escaping into the bathroom. If the P-trap becomes clogged or damaged, sewer gases can leak out and cause a臭味.
Dry P-trap: If the sink is not used frequently, the water in the P-trap can evaporate, allowing sewer gases to escape. This is often the cause of a smelly sink after a vacation or period of non-use.
Damaged or loose pipes: Cracks or leaks in the pipes under the sink can allow water to leak out and create a musty or moldy smell. Loose fittings can also allow sewer gases to escape.
Mold or mildew: Damp areas around the sink, such as the underside of the cabinet or the grout between tiles, can provide a breeding ground for mold or mildew. These microorganisms can create a musty or earthy odor.

How to Fix a Smelly Bathroom Sink

The best way to fix a smelly bathroom sink depends on the underlying cause. Here are some steps you can take:

Clean the drain: Remove the stopper and pour a drain cleaner down the drain. Let it sit for several minutes before flushing with hot water. If the clog is minor, this should clear it up. For more stubborn clogs, you may need to use a drain snake or call a plumber.
Check the P-trap: Remove the P-trap by unscrewing the nuts on either side. Clean out any debris and inspect the trap for cracks or damage. If the trap is damaged, it will need to be replaced.
Fill the P-trap: If the P-trap is dry, simply run water into the sink until the trap is full. This will create a seal and prevent sewer gases from escaping.
Tighten loose fittings: Use a wrench to tighten any loose nuts or bolts around the sink. This will prevent leaks and ensure that sewer gases are not escaping.
Clean mold or mildew: Remove any visible mold or mildew with a bleach solution. Be sure to wear gloves and a mask when cleaning mold.
Call a plumber: If you have tried all of the above steps and the sink still stinks, it's best to call a plumber. They can inspect the pipes and drains for more serious problems that may require professional repair.