§ 73.035 RESIDENTIAL SUBDIVISIONS AND MOBILE HOME PARKS
   (A)   Water mains and distribution system.
      (1)   Water mains shall be not less than six (6) inches in diameter, including fire hydrant branch connections, installed in conformity with the minimum requirements of the city. Where size and physical characteristics indicate, the developer may be required to install mains of a larger diameter.
      (2)   Water mains shall be so arranged that the distance between the intersecting mains does not exceed eight hundred (800) feet. If intersecting mains are at a distance in excess of eight hundred (800) feet, eight (8) inch or larger mains must be used.
      (3)   Eight (8) inch mains shall be used where a dead-end and poor-circulating gridiron is likely to exist for a considerable period of time, or where the layout of the streets and typographical characteristics are not well adopted to a circulating system.
      (4)   The distribution system shall be equipped with a sufficient number of valves so located that breakage or other interruption will not cause the shutdown of any portion of a main greater than eight hundred (800) feet. Wherever meters are installed in conjunction with fire hydrants, the meters shall be of the fire protection type and at least six (6) inches in size.
   (B)   Fire hydrant installation. Fire hydrants shall be spaced not farther than five hundred (500) feet apart as measured over hard-surface roads. In no event shall the distance between a fire hydrant and a building exceed three hundred (300) feet as measured on a hard-surface road.
   (C)   Fire hydrant type.
      (1)   Fire hydrants shall meet the minimum specifications and be installed in conformity with the requirements of the city.
      (2)   Fire hydrants shall be able to deliver six hundred (600) gallons per minute with a friction loss of not more than 2-1/2 pounds per square inch in the hydrant, and a total loss of not more than five (5) pounds per square inch between the street main and outlet.
      (3)   Fire hydrants shall be equipped with not less than two 2-1/2 inch outlets and a large pumper outlet.
      (4)   A gate valve must be installed in the hydrant connection to the street main.
(1986 Code)