5 min readDrain Cleaning
A bad smell from a drain is unpleasant — and a clue about what’s happening in your plumbing. The causes are usually fixable.
Here’s what’s behind drain odors and how to clear them.
Common causes of smelly drains
Most drain odors come from:
- Food, grease, and buildup decaying in the pipe
- A dry P-trap letting sewer gas escape (common in unused drains)
- Biofilm in the overflow or disposal
- A venting problem pulling sewer gas inward
- A deeper sewer-line issue
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Call (207) 419-2600How to fix the odor
Try these in order:
- Run water in unused drains to refill the trap
- Clean the disposal and overflow
- Have the drain professionally cleaned to remove buildup
- If the smell persists, have the vent and sewer line checked