The building sewer of each new building and of new work installed in any existing building shall be separate and independent from that of any other building and when available, every building shall have an independent connection with a public or private sewer.

Exception: where one building stands in the rear of another building on an interior lot, and no private sewer is available or can be constructed to the rear building through an adjoining court, yard or driveway, the building sewer from the front building may be extended to the rear building. (Ord. 781 § 15, 1975; Ord. 147 § 5.05, 1963)