§ 25-31.2. Water main pipe specifications.

(a)

Pipe for water mains shall be either ductile iron pipe or polyvinyl chloride pipe. All plastic pipe must be accompanied by a metal tracer approved by the city engineer.

(b)

Ductile iron pipe used in water mains shall meet the requirements of AWWA C151. The pipe shall have a cement-mortar lining and push-on joints. It shall have a thickness class of fifty (50) unless the depth of pipe will require a class greater than fifty (50) as shown in AWWA C151. A certification from the manufacturer that the pipe meets the above requirements shall be required. A copy of the manufacturer's test results may also be requested. Polyethylene encasement may also be required if corrosive soils are encountered. The testing of soils and the encasement shall be in accordance with AWWA C105. For pipe with a depth of four (4) feet, any of the standard laying trench conditions of AWWA C151, Type 1 through Type 5 may also be used. For depths greater than four (4) feet, the trench condition used shall be approved by the city engineer.

(c)

Polyvinyl chloride pipe (plastic pipe) used in water mains shall meet the requirements of AWWA C900 for pipe diameters four (4) inches to twelve (12) inches and AWWA C905 for pipe diameters fourteen (14) inches and AWWA C905 for pipe diameters fourteen (14) inches to thirty-six (36) inches. The pipe shall have a pressure class of one hundred fifty (150) psi and a DR of eighteen (18) unless otherwise specified by the city engineer. The outside diameter shall be equivalent to cast iron pipe. The pipe shall have elastomeric gasket bell ends. A certification from the manufacturer stating that the pipe meets the above requirements shall be required. A copy of the manufacturer's test results may also be requested. The pipe shall be accompanied by a metal tracer approved by the city engineer. The laying trench condition used shall be Type 4 or Type 5 of Figure 51.3, Standard Laying Conditions, AWWA C151.

(d)

All fittings for water mains shall be ductile iron or cast iron and shall meet the requirements of AWWA C110. The fittings shall have a cement-mortar lining and have mechanical joints. They shall have a minimum pressure rating of two hundred fifty (250) psi.

(e)

Valves used in the installation of a water main shall be located as specified by the city engineer. They shall be gate valves and meet the requirements of AWWA C500 and AWWA C509. Valves meeting the requirements of AWWA C509 shall be iron-body, resilient seated, nonrising stem valves. All valves shall have ends of standard mechanical joints and shall be mounted in a vertical position. They shall be provided with double "O" rings for sealing of the valve stem. They shall be equipped with two-inch square operating nuts and close on clockwise rotations. Valve boxes shall be cast iron, two-piece, screw-type with five and one-fourth (5¼) inch shaft for roadway service. The cover shall have the word "WATER" cast on its top. A certification from the manufacturer stating that all fittings and valves used in the installation meet these requirements shall be required. All valves shall be designed for operation and a working pressure of not less than two hundred psi.

(Ord. No. 10911, § 2, 4-2-90)