NR 811.68(1)(1) Municipal ownership. The distribution system of a municipal water system shall be owned and maintained by the waterworks owner.

NR 811.68(2)(2) Municipally owned mains on private property. All water mains and other distribution system components owned by a municipal water system on private property shall be installed in permanent easements.

NR 811.68 NoteNote: To assure the use of approved materials and proper installation and maintenance, the department recommends that fire hydrants and water mains to be constructed on private property be installed in permanent easements and owned and maintained by the waterworks owner.

NR 811.68(3)(3) Privately owned looped mains and private water services requiring check valves. Water mains and water services to be connected to the publicly owned distribution system at more than one point may be privately owned and maintained provided that a check valve is installed on the water main at each point of connection to the distribution system to prevent water from flowing back into the distribution system. Each check valve shall be located in a manhole or vault and shall be immediately preceded and followed by a buried or exposed shut-off valve on the main. The water supplier shall have access to the manholes and valves for inspection purposes.

NR 811.68 NoteNote: A drain fitting may be added on the piping between the check valve and the gate valve on the public water system side of the check valve. The gate valve may be closed and the drain fitting opened to periodically check for leakage through the check valve. Refer to s. SPS 382.40 for standards for the construction of private water mains.

NR 811.685NR 811.685 Interconnections with other water sources. A water system owner shall obtain department approval prior to any interconnections between a public water supply system and another source of water in accordance with s. NR 810.15 (2), including interconnections solely for emergency backup purposes.

NR 811.69(1)(1) Acceptable materials. All pipe used for water main installations shall be cast iron, ductile iron, steel, reinforced concrete, polyvinyl chloride, high density polyethylene, copper, or materials specially approved by the department for restricted or experimental use. If a restricted or experimental use approval is issued, the department may require special precautions until a satisfactory use record has been established. For polyvinyl chloride pipe, the pipe shall have a maximum dimension ratio of 18 and only joints with elastomeric gaskets or butt fusion welds shall be used.

NR 811.69(2)(2) Standards. Pipes, joints, fittings, valves, and fire hydrants shall have been manufactured in conformity with the latest standards issued by the AWWA and may not be used unless approved by the department. All pipe shall be minimum AWWA pressure class 150 and shall be designed for a minimum 100 psi working pressure except as approved by the department for special low pressure applications. Specifications for water main pipe and joints for water mains having a diameter less than those contained in AWWA standards shall meet the requirements of s. SPS 382.40.

NR 811.69 NoteNote: A copy of the AWWA standards is available for inspection at the central office of the department of natural resources and may be obtained for personal use from the American Water Works Association, 6666 West Quincy Avenue, Denver, Colorado 80235.

NR 811.69(3)(3) Lead free. Any pipe, pipe fittings, solder, or flux used in the installation or repair of any public water system shall be lead free. “Lead free” means, with respect to solders and flux, containing not more than 0.2 percent lead and, with respect to pipes and pipe fittings, containing not more than 0.25 percent lead. Repairs to lead joints shall be made using alternative methods, if possible. For ductile iron pipe, the use of lead tipped gaskets is prohibited.

NR 811.69(4)(4) Protection against corrosion. Special attention shall be given to selecting pipe materials which will protect against internal and external corrosion. If soils, groundwater, or both, are aggressive, ductile iron water mains shall be provided with polyethylene encasement installed in conformity with the latest AWWA standards.

NR 811.69(5)(5) Protection against contamination from organic compounds in soil and groundwater. If possible, construction of water mains through or near areas of soil or groundwater contamination shall be avoided. Special attention shall be given to selecting pipe and gasket materials for construction in contaminated soil or groundwater which will protect against external corrosion and penetration of the pipe and gaskets by the contaminants. Water mains designed to pass through or near areas of contaminated soil or groundwater shall meet the following requirements:

NR 811.69(5)(a)(a) The department shall be contacted to obtain approval of the water main design requirements prior to the submittal to the department of the plans and specifications.

NR 811.69(6)(6) Rehabilitation. All materials used for the interior rehabilitation of water mains shall meet ANSI/NSF standards and may not be used until specifically approved by the department.

NR 811.70(1)(1) General. Water mains and water distribution systems shall be designed and operated to maintain point-of-entry water quality. Special consideration shall be given to distribution main sizing, providing multidirectional flow when possible, providing an adequate number of shut-off valves for distribution system control, providing an adequate number of fire hydrants where fire protection will be provided, and providing for adequate flushing throughout the system. Systems shall be designed to maximize turnover, to minimize the number of dead ends, and to minimize residence times while delivering pressures and flows meeting the requirements under subs. (4) and (6).