The minimum size of a Building Sewer shall be four inches (4") in diameter. A Building Sewer serving a duplex or multiple dwelling shall be not less than six inches (6") in diameter. When more than one Building Sewer shall be connected to a single Side Sewer, the Side Sewer from the point of intersection of one or more Building Sewers to the Public Sewer shall be not less than six inches (6") in diameter. Notwithstanding the minimum size and slope requirements of this section, the size and slope of all Sewer lines described herein must be approved by the District (or City of Fresno as applicable) prior to installation. [Ord. 2022-2 § 8, 2022.]