A sanitary sewer service lateral is typically a 6-inch diameter sewer pipe that connects your home or business to the separate sanitary sewer system. Wastewater generated from kitchens, bathrooms, sinks, toilets, and other interior drains is conveyed to the separate sanitary sewer system through this pipe. The figure below provides an illustration of a typical configuration of a sanitary sewer service lateral including cleanouts.
The cleanouts are access points to allow property owners to facilitate the cleaning of the sanitary sewer line to prevent a build-up of debris within the line. These are typically found in the front or rear yard and have an open pipe or a pipe with a cap on the top. Another location for cleanout access may be inside the home on the plumbing stack
The property owner. The City is responsible for maintain the separate sanitary sewer system including the sanitary sewer pipes, manholes and wastewater treatment facilities. The property owners is responsible for maintaining the sanitary sewer service lateral and cleanouts.