Broken, Clogged or Poorly Installed Vent PipesnWhen it gets clogged, the sewer gases can back up into the sinks and the toilet, resulting in your bathroom's sewage smells. You may experience a bubbling sound coming from the toilet or the drain as sewer gas forces its way into the bathroom.Mar 8, 2021,
What is a P-trap? The P-trap is a crucial element of the home plumbing system. It is the U-shaped section of the pipe located underneath the sink. Its function is to trap and hold enough water, which acts as a barrier to prevent sewer gases and odors from making their way into the bathroom.Jan 14, 2021
There could be odor-causing bacteria feeding on debris in your pipes. This process will give off a foul-smelling hydrogen sulfide gas, which smells like sewage or rotten eggs. Also, mold grows where it's warm and wet — and mold growth on the debris causing a drain clog can also cause a bad smell.
If you are detecting foul sewer odors inside the house, this means that there is a weak link somewhere in your plumbing system. Possible sources include bathroom sink drains, toilets, kitchen drains, basement drains, old cast iron piping, or even the vent stack that goes out through your roof.Jul 15, 2016
One of the common reasons is drain obstacle or drain clogs. An block in the drain will often prevent water from flowing freely through the pipes. Oftentimes, the water become stuck along with other solid materials. And once these materials start to rot or decompose, it produces a poop-like smell.