17.16.170: SERVICE PIPES; MATERIALS AND INSTALLATION:
All service and other pipes used underground shall be of a type and size approved by the director of the department of public utilities, laid not less than four feet (4') below the surface of the ground, and of sufficient strength to stand the water pressure. All work upon alterations or extensions of water pipes, shall be subject to acceptance of the director. (Prior code § 49-6-11)