Why sewer gas is a problem
Sewer gas contains hydrogen sulfide and methane. Beyond the awful smell, prolonged exposure can cause headaches and nausea, and methane is flammable. A persistent sewage smell deserves prompt attention.
1. Dry P-trap
Every drain has a water-filled trap that blocks sewer gas. In a rarely used guest bathroom, basement floor drain or laundry sink, that water evaporates. Pour a gallon of water down the drain; if the smell fades, that was it.
2. Failed toilet wax ring
A rocking toilet or a sewer smell near the base often means the wax ring seal has failed. Our toilet repair team resets toilets with a new seal quickly.
3. Blocked or broken plumbing vent
Vent stacks let sewer gas escape above the roof. Bird nests, leaves or ice can block them, and cracked vent pipes inside walls leak gas into living spaces.
4. Biofilm in drains
Hair, soap and grease form a bacterial film inside drain pipes that smells like sewage. Professional drain cleaning removes it.
5. Cracked or broken sewer line
A damaged main sewer line under the basement or yard can release odor into the home and soil. A sewer camera inspection confirms it, and sewer line repair — often trenchless — fixes it for good.
6. Sewer backup brewing
If the smell comes with gurgling drains or slow toilets, a main line backup is imminent. Call before sewage ends up in your basement.
Get Help From a Local Pennsylvania Plumber
Patrick Chase Plumbing Co. serves every city in Pennsylvania 24/7. Call (888) 809-6756 for same-day service and upfront pricing.