Your sink may smell perfectly normal when it is dry, but the moment you turn on the faucet, an unpleasant odor suddenly fills the room. Sound familiar? This strange plumbing problem can leave homeowners wondering, “Why does my sink only smell when water is running?”
The answer often lies inside your drain. Water can disturb buildup, bacteria, or plumbing gases that are sitting where you cannot see them. For Los Angeles homeowners, identifying the source early can help prevent a small odor problem from becoming a larger plumbing repair.
Food And Debris May Be Sitting In The Drain
Your kitchen sink handles plenty of food particles, grease, soap, and other debris. Over time, some of this material can stick to the inside of the drainpipe.
When water runs through the pipe, it can disturb this buildup and release an unpleasant smell. If the odor is strongest while the water is flowing, a dirty drain may be the first place to investigate.
Your Garbage Disposal Could Be The Problem
Does your kitchen sink have a garbage disposal? Food particles can become trapped beneath the rubber splash guard or inside the disposal chamber.
Even if the sink looks clean, hidden food debris can begin to break down and produce odors. Running water can stir up those smells and push them back toward the sink opening.
Bacteria Can Grow Inside The Drain
Moisture and organic material create an ideal environment for bacteria inside plumbing pipes. Soap residue, grease, toothpaste, and food particles can form a thin layer called biofilm.
When water flows through the drain, it can release odors from this buildup. Regular drain cleaning can help reduce the problem, but persistent smells may indicate buildup deeper inside the plumbing system.
The P-Trap May Need Attention
The curved pipe beneath your sink is called a P-trap. It holds water that helps block sewer gases from entering your home.
If the P-trap is damaged, improperly installed, or losing its water seal, unpleasant odors may become more noticeable when water moves through the plumbing. This issue is especially important to address if the smell resembles sewage.
When To Call A Los Angeles Plumber
If cleaning the sink does not solve the plumbing problem, it may be time for a professional inspection. Persistent odors can point to hidden drain buildup, vent problems, damaged pipes, or other plumbing concerns.
At Adeedo Drains, Plumbing, Heating, & Air, our team helps Los Angeles homeowners identify the real source of stubborn sink odors and provide reliable plumbing solutions. If your sink smells fine until you run the water, contact Adeedo for professional help and get your home smelling fresh again.