Drain Odors: Common Causes and Fixes Without Repair
Foul odors coming from a sink, shower, or floor drain are one of the most common household plumbing complaints. While the smell can be unsettling, many causes are manageable without calling for major repairs. The key is to narrow down where the odor is originating and address the underlying problem—often in under an hour.
In most cases, drain odors are linked to sewer gases escaping through the plumbing system. A properly functioning water seal inside a P-trap (or similar trap) prevents foul gases from entering your home. If that seal is missing, disturbed, or overwhelmed by debris, unpleasant smells can surface quickly.
Dry or disrupted water seals
If a fixture hasn’t been used recently—like a guest bathroom sink, seldom-used shower, or infrequently drained tub—the water in the P-trap can evaporate. Without that water barrier, gases can rise and become noticeable. Likewise, cleaning act ... Read more »
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