Every service pipe shall be laid with sufficient bend to allow not less than one foot of extra length and in a manner as to prevent rupture by settlement. The service pipe shall be placed not less than six feet below the surface and be so arranged as to prevent rupture by freezing. A shut off or other stop cork with waste valve of the size and strength required shall be placed close to the inside wall of the building and be well-protected from freezing. Copper tubing shall be used for all services of two inches or less. Joints on copper tubing shall be as few as possible and not more than one joint shall be used for a service up to 70 feet in length. Each joint shall be left uncovered until inspected by the city. Connections with the mains for domestic supply shall be at least one inch per residential unit or equivalent.
(2001 Code, § 3.20)