NR 811.27(1)(a)(a) A dedicated on-site generator or engine. A dedicated on-site generator may be located inside or outside the building. Dedicated on-site engine-generator sets installed within the building shall be located in a separate room. Diesel fuel tanks shall be provided with secondary containment and interstitial leakage monitoring and the installation shall receive written approval from the department of safety and professional services or its authorized agent under ch. ATCP 93 prior to installation. All fuel lines shall be exposed above grade. Water lines to water cooled units shall be provided with backflow prevention in accordance with s. SPS 382.41.

NR 811.27(1)(b)(b) A portable power source owned by the municipality and dedicated to the water supply facility operation.

NR 811.27(1)(c)(c) A portable power source not owned by the municipality but only if the water system owner obtains a written agreement with the owner of any portable power source, including tractors or trailered engine-generator sets, that requires the water system owner to have primary access to the power source in an emergency and that allows the portable power source to be brought to the water system as required for testing. The portable power source shall be located in the community if practical.

NR 811.27 NoteNote: The department recommends the use of water system owned dedicated on-site or portable engine-generator sets in all cases. It is recommended that the equipment necessary to convert natural gas fueled engines to propane be maintained on site in case the natural gas supply has to be shut off for any significant length of time. It is recommended that exterior engine-generator set installations be installed within a locked security fence.

NR 811.27(2)(2) Alternate prelubrication methods. The pump installation shall be provided with a prelubrication line with a valved bypass around the automatic control and backflow protection, if appropriate, in order to allow temporary continuous prelubrication, whenever automatic prelubrication of pump bearings is necessary and an auxiliary power supply is provided that will not provide power to the automatic prelubrication controls.

NR 811.27 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; correction in (1) (a) made under s. 13.92 (4) (b) 6., 7., Stats., Register December 2011 No. 672; correction in (1) (a) made under s. 13.92 (4) (b) 7., Stats., Register October 2013 No. 694; CR 22-074: am. (1) (c) Register January 2024 No. 817, eff. 2-1-24.

NR 811.28(1)(a)(a) Meet the applicable reservoir construction requirements of subch. IX.

NR 811.28(1)(b)(b) Have all below grade metal pump cans, if installed, exposed in a basement or vault.

NR 811.28(1)(c)(c) Have 2 pumping compartments or other means to allow the suction well to be taken out of service for inspection, maintenance, or repair.

NR 811.28(2)(2) Suction lift. Suction lift shall be allowed only for distances of less than 15 feet and where provision is made for priming the pumps. Suction lift may not be permitted if buried piping carries the finished water.

NR 811.28(3)(3) Priming. Prime water may not be of lesser sanitary quality than that of the water being pumped. Means shall be provided to prevent backflow. When an air-operated ejector is used, the screened intake shall draw clean air from a point at least 10 feet above the ground or other source of contamination, unless the air is filtered by apparatus approved by the department. Vacuum priming may be used.

NR 811.28(4)(4) Automatic and remote controlled stations. All automatic stations shall be provided with automatic signaling equipment which will report pump on-off operation and the status of other important functions, such as intrusion alarms, to the main station. Pressure monitoring shall be included if a separate pressure zone is established. All remote controlled stations shall be electrically operated and controlled and shall be provided with reliable signaling equipment.

NR 811.28(5)(a)(a) Valves. Pumps shall be adequately valved to permit satisfactory operation, maintenance and repair of the equipment. If foot valves are provided, they shall have a net valve area of at least 2.5 times the area of the suction pipe and shall be screened. Each pump shall have an automatically closing valve or check valve on the discharge side between the pump and shutoff valve. Devices such as motor controls, slow opening and closing check valves, or surge relief valves shall be installed where necessary to minimize pressure surges or water hammer.

NR 811.28(5)(b)(b) Piping. Piping shall be designed to minimize friction losses and shall be protected against pressure surges or water hammer. Piping shall be supported, restrained, and buttressed as necessary. Where applicable, each pump shall have an individual suction line or manifolded lines that ensure similar hydraulic and operation conditions. Discharge piping exposed in buildings shall be ductile iron, copper, steel, stainless steel, or galvanized pipe. For other-than-municipal water systems, piping downstream of the control valve is subject to requirements under ch. SPS 383. The use of minimum schedule 80 PVC pipe meeting the requirements of SPS Table 384.30-7 is acceptable when the water to be carried in the piping can be documented as being aggressive to metal pipe or when necessary to be compatible with water treatment equipment and processes provided that the piping is properly restrained. All piping shall be certified to ANSI/NSF standard 61 dated March 15, 2022, which is incorporated by reference.

NR 811.28 NoteNote: A copy of ANSI/NSF standard 61 dated March 15, 2022 is available for inspection at the Legislative Reference Bureau and may be obtained for personal use from NSF International, https://www.nsf.org/.

NR 811.28(5)(c)(c) Gauges and meters. Each pump shall have a standard pressure gauge on its discharge line and have a compound pressure gauge on its suction line if suction pressures are expected to be encountered. Where suction or discharge headers are utilized, only one gauge is required on each header. In addition, the station shall have indicating, totalizing, and recording metering of the total water pumped.

NR 811.28(5)(d)(d) Water seals. Water seals may not be supplied with water of a lesser sanitary quality than that of the water being pumped. Where pumps are sealed with potable water and are pumping water of lesser sanitary quality, the water supply to the seal shall:

NR 811.28(6)(6) Painting of piping. In order to facilitate identification of piping in waterworks, pumping stations, pumphouses and, water treatment plants, it is recommended that the following color schemes be utilized for purposes of standardization:

NR 811.28(6)(e)(e) For liquids or gases not listed above, a unique color scheme and labeling shall be used. In situations where 2 colors do not have sufficient contrast to easily differentiate between them, a 6 inch band of a contrasting color shall be painted on one pipe at approximately 30 inch intervals. The name of the liquid or gas should also be painted on the pipe. Arrows may be painted on the piping indicating the direction of flow.

NR 811.28 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; correction in (5) (b), (d) 1. made under s. 13.92 (4) (b) 6., 7., Stats., Register December 2011 No. 672; CR 22-074: am. (5) (b) Register January 2024 No. 817, eff. 2-1-24.