There shall be separate service pipes laid from the main to each building wherever there is a water main laid in front or rear of such building. The mode of entry should be at the discretion of the Water and Sewer Department. Where services are laid to premises where there are no water mains available for direct connections, a small temporary main will be permitted to be laid as hereinafter provided under Section 7-1-17. In all cases each building served must have an independent service shut-off. (1994 Code)