Water supply and distribution system, when installed in subdivisions shall be in accordance with the following standards:
A. Plans And Specifications: Prior to the approval of the final maps, the subdivider shall submit to the city engineer plans of a water supply and distribution system prepared by a qualified engineer of sufficient detail, to enable the city to ascertain whether such system conforms to the standards set forth herein and to the standard of acceptable engineering practices.
B. Water Supply: The water supplied for a subdivision shall be obtained from the city or appropriate water district. All water supply systems provided by the city, must also comply with the provisions of title 8 of this code.
C. Design And Construction:
1. Generally: The distribution system shall be so designed and constructed that it will maintain a normal operating pressure at all service connections of not less than eighty (80) pounds per square inch above atmospheric pressures. Adequate storage or emergency standby power shall be supplied, if required.
2. Materials Of Construction: Metallic and nonmetallic materials may be used separately and in combination to construct component parts of a water system, including, but not limited to, conduits, pipes, couplings, caulking materials, protective linings and coatings, services, valves, hydrant pumps, tanks and reservoirs, provided:
a. The materials shall be capable of withstanding, with ample safety factors, the internal/external forces to which subjected.
b. The material shall not cause the water to become impure, unwholesome, unpotable or unhealthful.
c. Material and equipment is so selected as to mitigate corrosion, electrolysis and deterioration.
3. Water Mains: All water mains must be placed in suitable rights of way prior to the surfacing. All water mains shall be installed below the frost line minimum of four feet (4') from finished grade or be otherwise protected to prevent freezing insofar as it is practicable. The distribution system shall be laid out so that repairs may be effected with interruption of service kept to a minimum number of customers with not more than three (3) valve closures required to discontinue service. Dead ends in mains shall be avoided insofar as practicable, and a means shall be provided to flush any dead ends which may be installed in the mains. All water mains shall be AWWA C-900 class 150 or equivalent or AWWA C-100 ductile iron pipe.
4. Service Connections: A service connection pipe at least three- fourths inch (3/4") nominal size shall be placed to each lot from the water main prior to the surfacing of the streets and alleys affected; service pipe shall be laid to a depth thirty inches (30") to thirty six inches (36") sufficient to prevent freezing, except at its termination in connecting with a meter or customer's piping. Where duplex service is appropriate, the service connection shall be one inch (1") and be laid in a like manner as a single service. Meters and typical water services will be to city specifications.
5. Fire Hydrants: Fire hydrants shall be placed so that no point in any of the streets fronting on lots served by the water distribution system is farther than that which is recommended by the uniform fire code (latest edition) and the district fire chief. Each fire hydrant shall be installed in a utility easement or within a public right of way and shall have a gate valve between the water main and the riser. Fire hydrants shall be of a type and size as per city specifications. The water supply and distribution system shall be so designed and constructed that it will supply fire flows as specified by the uniform fire code, latest adopted edition. No water main serving any fire hydrant shall have an inside diameter of less than six inches (6"). Fire flow for commercial development will be provided per uniform fire code, current adopted edition. Calculations shall be submitted to the city engineer and the district fire chief to verify that the minimum requirements are met.
D. Water Meters: Water meters placed on the city system shall be minimum three-fourths inch (3/4") with touch read capability. Meter boxes and lids shall be as specified by the city.
E. Additional Requirements: The city may make additional requirements for water systems having unusual problems to solve such problems by sound engineering practices as a prerequisite to the approval of such plans. (1973 Code § 16.24.090)