(A) The stop cock or corporation cock at the main and the curb cock at the sidewalk or curb shall be standard bronze. The curb cock shall have a cast iron box or cover. The pipe between the stop cocks at the main and the sidewalk shall be of approved copper or alloy pipe. Where the sewer and water connections are laid in the same trench, the water connection must be of copper pipe of a quality approved by the Council and the sewer connection of cast iron pipe or tubing approved by the Council.
(B) Sewer and water service from a building to the connection at the main are owned by the property owners and they are responsible for all repairs and maintenance except for the operation of the curbstop.
(`89 Code, § 161.050)