Why Does My Outside Vent Stack Smell Like Sewage

These gases are a natural byproduct of the bacteria that break down the waste in either your septic system or sewer line. Because of this naturally occurring cycle, the septic and sewer gases have a foul odor. Normally, the gases are carried up and away from the system's stink pipe.,

Why does it smell like sewage outside my house?

A sewer smell outside your house can mean that the city sewer is backed up. But if the smell is constantly present it can have to do with your roof leader line outlets, or area drains. Although storm sewer systems should not contain sewer gases, sanitary and combined sewer systems do.Jun 23, 2014

Leave a Comment