Whenever practical, the building sewer shall be brought to a building at an elevation below the lowest drain. In buildings where a drain is too low to permit gravity flow to the Commission's wastewater sewer, wastewater carried by such building drain shall be lifted by an approved means and discharged to the Commission's wastewater system
('81 Code, § 51.5.04) (Ord. passed 4-19-93; Am. Ord. 11011, passed 2-8-11)