Sewer gas is a natural byproduct of human waste breaking down in the sewer system. It contains a mix of gases, including hydrogen sulfide and methane, which can produce a strong and unpleasant odor. Many people describe it as similar to the smell of rotten eggs or spoiled food.
Your home’s plumbing system is designed to prevent these odors from entering your living space. It does this through two key features:
- Traps: U-shaped sections of pipe located under sinks, floor drains, and other fixtures. These hold a small amount of water that forms a seal to block gases from entering the home.
- Vents: Pipes that allow sewer gas to safely escape through the roof and help maintain air pressure in the plumbing system.
Common Causes of Indoor Sewer Odors
If you notice sewer odors inside your home or building, they may be caused by one or more of the following issues:
- Dry drains: Drains that are not used frequently can dry out, breaking the water seal in the trap. Running water down the drain may resolve the issue.
- Loose or missing caps: Floor drain plugs (or clean-out caps) may be improperly installed or missing.
- Blocked vent pipes: Vents on the roof can become clogged with debris, leaves, or snow.
- Cracked or damaged pipes: Interior vent or drain pipes may be cracked, disconnected, or leaking inside walls or under floors.
A visual inspection or basic maintenance can often correct the problem. If odors persist, it may be necessary to consult a licensed plumber to assess your system for leaks or other issues.
Optional Repair Plans Through HomeServe USA
The Unified Government partners with HomeServe USA to offer residents access to optional, low-cost emergency repair plans. These plans provide:
- 24/7 access to a repair hotline
- Professional service from licensed technicians
- A one-year guarantee on all covered repairs
To learn more about available plans and enrollment, visit the HomeServe USA website.