The underground pipe outside a building that connects the building's drain system to the city sewer or septic tank.
The pipe that extends from the building drain at the foundation wall to the public sewer main or private septic system. The building sewer is the responsibility of the building owner and must be installed with proper slope, cleanouts, and separation from water supply lines. Material options include PVC, ABS, cast iron, and vitrified clay pipe.
The camera inspection revealed a belly in the building sewer that was causing chronic slow drainage on the ground floor.
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