The text
68.
All water mains laid as replacements or extensions of the existing system shall be a minimum of eight inches in diameter, and shall comply with plans for the future water system network. Six inch pipe may be laid for short distances between larger sized mains, or in other circumstances, but only by special permission of the commission.
If the commission requires the installation of a water main of larger diameter than ten inches, they shall bear the cost difference between the ten inch main and the larger size required.
Design and layout of the proposed water main, including valves, hydrants and appurtenances, shall be according to accepted good engineering practice and shall be approved by the commission before any material shall be ordered or construction work started.
Water mains shall be laid with a minimum of four to six inches of cover, with proper tamping, and with backfill placed in accordance with commission specifications.
Materials to be used in the construction work shall be as specified and approved by the commission.