All drain connections with sewer pipes shall be adequate in size, with minimum of four-inch laterals, to convey and allow to pass freely whatever waste may be properly carried therein. Back-up valves must be placed in all basement drains. In new construction, all sewer services are required to have an in-line check valve.
('72 Code, § 50.003) (Am. Ord. passed 4-15-93) Penalty, see § 10.99