NR 812.32(5)(b)1. 1. General sealing requirements. Lineshaft turbine pumps shall be mounted on the well or over the well casing pipe on a pump platform or well casing pipe flange so as to effectively seal the top of the well. Any opening through the pump discharge head shall be sealed watertight.

NR 812.32(5)(b)2. 2. Specific sealing requirements. The discharge head for a lineshaft turbine pump may be installed over the well casing pipe under the following conditions:

NR 812.32(5)(b)2.a. a. A minimum 12 inch high concrete pump platform shall be poured surrounding the well casing pipe. The well casing pipe shall project at least one inch up into the pump discharge head as depicted in figure 38A.

- See PDF for diagram Figure 27. Non-spool type pitless units. (For acceptable procedures for connection of the units to the well casing pipe see s. NR 812.31 (3)).

NR 812.32(5)(b)2.b. b. If the pump discharge head does not have enough recess to extend down over the well casing pipe at least one inch, a cast iron or steel subbase sanitary ring at least one inch thick shall be bolted to the base of the discharge head and installed surrounding the well casing pipe. A compressible neoprene gasket shall be installed between the base of the discharge head and the sanitary ring or subbase unless the metal surfaces are machined. This is depicted in figure 38L. As an alternative a flange may be welded to the top of the well casing pipe as depicted in figure 38C.

NR 812.32(5)(b)2.c. c. If a concrete pump platform is not to be poured surrounding the well casing pipe, a steel flange shall be welded watertight to the top of the well casing pipe. The base of the discharge head shall be bolted to the casing flange and a compressible neoprene gasket shall be installed between the 2. This is depicted in figure 38D.

NR 812.32(5)(b)2.d. d. The well casing pipe may be enlarged above grade to accommodate the pump column flange, by fillet welding or threading a steel flange plate watertight to the top of the well casing pipe. A piece of larger diameter pipe meeting Table V requirements shall then be fillet welded watertight to the top of the flange plate. The pump discharge head shall then be installed as provided in subd. 2. a. to c.

NR 812.32(5)(b)3. 3. Lubrication of lineshaft turbine pumps.

NR 812.32(5)(b)3.a. a. Water lubricated lineshaft turbine pumps shall be used for potable wells. In water levels deeper than 50 feet, the pump column bearings shall be pre-lubricated prior to pump start up. Lubrication during pump backspin shall be provided if necessary. Water for lubrication of pumps shall be supplied by piping connected to a supplemental pressure system of the potable water supply. Water lubricated lineshaft turbine pumps are recommended for nonpotable wells.

NR 812.32(5)(b)3.b. b. Oil lubricated lineshaft turbine pumps may be used for potable wells when the pumping water level is deeper than 250 feet except when the pump operation is expected to lower the water level in the well to a point below 5 feet above the bottom of the well casing pipe. Oil lubricated lineshaft turbine pumps may be used for nonpotable wells providing the lubricants are USDA or FDA approved food contact grade formulations.

NR 812.32 Note Note: Such formulations are usually based on National Formulary white, food grade mineral oil.

NR 812.32 Note Note: The department may allow the installation of oil lubricated lineshaft turbine pumps for potable wells when the pumping water level is less than 250 feet deep when unique circumstances warrant such installation.

NR 812.32(6) (6) Discharge lines from lineshaft turbine pumps.

NR 812.32(6)(a) (a) Pressurized. Discharge lines from lineshaft turbine pumps that are maintained under system pressure at all times shall contain an air-vacuum relief valve preceding a check valve. A well vent shall be installed in the pump base. This is depicted in figure 39.

NR 812.32 Note Note: Where backspin may be expected to occur, the department recommends a time delay or backspin ratchet be provided to protect the motor in the event the pump controls are energized before the pump stops backspinning.

- See PDF for diagram Figure 28. A weld-on pitless adapter.

NR 812.32(6)(b) (b) Nonpressurized. Buried discharge lines from lineshaft turbine pumps that are not maintained under system pressure at all times shall contain an UL approved check valve or shall contain an air-vacuum relief valve near the pump, and prior to any buried portion of discharge pipe. When water is pumped to a pond or other body of water, the end of the pump discharge pipe shall be extended at least 2 pipe diameters above the highest elevation of the water in the pond or other body of water.

NR 812.32(7) (7) Hand pumps.

NR 812.32(7)(a) (a) Hand pump heads shall be designed and fabricated so there are no unprotected openings, other than the spout, to the interior of the pump. The water spout shall turn downward and be closed on top. If a separate watertight port is provided for priming, it shall be sealed watertight when not being used. Unsealed openings may not exist in the pumpbase. If the pump is installed outside, a concrete crack-free watertight pump platform at least 6 feet in diameter, as depicted in figure 40 shall be provided. The top of this platform may be at ground grade, but in any case the platform shall be mounded so that water does not accumulate around the well. If excess water flow from the pump spout is channelized, it shall be directed to a point at least 8 feet from the well with a drain pipe or watertight channel.

NR 812.32(7)(b) (b) Hand pumps shall be connected firmly to the well casing pipe by threading in small diameter well casing pipe or by bolting the pumpbase flange to a well casing pipe flange with a gasket to seal the top of the casing. This is depicted in figure 40. Other types of hand pump bases may be used if they meet the approval criteria in s. NR 812.30 (1) for vermin-proof caps and seals.

NR 812.32(8) (8) Casing not part of pump installation. The well casing pipe for any drilled well greater than 2 inches in diameter may not be used as a delivery pipe in the pumping operation, except when the well casing pipe is under continuous pressure as with a packer-jet pump installation.

NR 812.32(9) (9) Pump installations for flowing wells.

NR 812.32(9)(a) (a) Underground pipe connections. Underground pipe connections may only be made to a flowing well with an approved pitless adapter.

NR 812.32(9)(b) (b) Unprotected suction lines. An offset shallow well pump may not be connected directly to the buried pipe exiting a pitless adapter or unit of a flowing well or to a pipe extending out of the seal at the top of the well and redirected back into the ground. Buried piping from the flowing well shall discharge to a surge tank having either an overflow pipe or an air-vacuum relief valve installed in the top of the tank. A booster pump shall be connected to the surge tank and discharge into a pressure tank.

NR 812.32(9)(c) (c) Overflow piping.

NR 812.32(9)(c)1. 1. When a flowing well is placed in use, the flow from the well shall be regulated by means of a control valve with a screened outlet or with a restricting orifice to prevent waste of water. The control valve shall be restricted as much as possible and closed if the flow ceases.

NR 812.32(9)(c)2. 2. A controlled overflow pipe or other means shall be installed for a flowing well to prevent damage from overflowing water or to prevent freezing of the top of the well.

NR 812.32(9)(c)3. 3. Overflow to prevent freezing shall be limited to a minimum to preserve groundwater and water pressure. The overflow pipe shall be installed to extend at least 12 inches above ground grade or shall extend from a surge tank. The overflow pipe shall terminate at least 2 pipe diameters above any drain at the well site, building or building basement. If the overflow is installed at the well, an air gap of at least 2 pipe diameters shall be provided at the well and the receiving drain shall discharge to the ground or to a gravel pocket at a point at least 8 feet from the well. A funnel receptacle shall be installed on the inlet of the drain to accept all of the overflow water, to prevent splashing and to prevent ponding of water around the well casing pipe.

NR 812.32 History History: Cr. Register, January, 1991, No. 421, eff. 2-1-91; am. (2) (a) 1. and 5., (6) (b) and Figure 32, renum. (4) (b), (6) (c), (7) and (8) to be (4) (b) 1., (7) to (9) and am. (7), (9) (c) 2. and 3., cr. (1) (a) 6., (d) and (4) (b) 2., Register, September, 1994, No. 465, eff. 10-1-94; correction in (4) (b) 1. c. made under s. 13.93 (2m) (b) 7., Stats., Register, May, 2000, No. 533; correction in (4) (b) 1. c. made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672; reprinted to reinsert omitted text in (4) Register January 2012 No. 673.

NR 812.33 NR 812.33  Water storage vessels. The department recommends that pressure tanks be sufficiently sized to provide the minimum pump run time recommended by the pump manufacturer.

NR 812.33 Note Note: Community water systems regulated under ch. NR 811 are required to have a gross pressure tank volume of 10 times the pump capacity.

NR 812.33(1) (1) Pressure tanks.

NR 812.33(1)(a) (a) General. Tanks relying on expansion of a flexible membrane within a restricting container, rather than on a water to air interface to provide pressure in the water system, may be used. All pressure tanks for storing potable water under pressure, including those having an air space for expansion, shall be identified by seal, label or plate indicating the manufacturers name and model number and shall meet the following specifications:

NR 812.33(1)(a)1. 1. Pressure tanks to be buried shall be constructed of steel, fiberglass or other comparable non-metallic composite material. Steel tanks with metallic discharge piping, meeting the requirements of s. NR 812.28, shall be used in contaminated soil areas. Steel tanks to be buried shall have a minimum wall thickness of 0.25 inches. Fiberglass or other non-metallic tanks to be buried shall have the structural strength to prevent collapse of the tank. Manufacturer's instructions shall be followed. All buried tanks shall be back-filled in place with sand, compacted in place. Steel pitless receiver tanks, when they are part of approved pitless units attached directly to the well casing pipe, shall also have a minimum wall thickness of 0.25 inches. Any air unloader pipe, tank air valve or any other pipe connection extending up to the ground surface shall terminate at least 12 inches above ground grade.

NR 812.33 Note Note: The department recommends that a surface air check kit be installed for a buried pressure tank to check, maintain and adjust the air pressure pre-charge of the tank. Also, in uncontaminated soil areas, pipe and pipe connections to the tank should be made with flexible pipe and fittings meeting the requirements of s. NR 812.28 to minimize strain or pressure on the tank or the tank fittings.

- See PDF for diagram Figure 29. Method for pressure testing a pitless adapter or unit.

NR 812.33(1)(a)2. 2. Pressure tanks having a gross volume in excess of 500 gallons, and not having a water to air interface bladder, shall have the following:

NR 812.33(1)(a)2.a. a. If the tank is buried, all electrical controls extended to at least above ground grade.

NR 812.33(1)(a)2.b. b. Each tank shall have an access manhole, a drain, and pressure gauge, pressure relief valve, water sight glass and pressure or probe operated controls for the pumps.

NR 812.33(1)(a)2.c. c. An air compressor or other suitable means to add air to the tank.

NR 812.33 Note Note: The department recommends that the tank have bypass piping to allow operation of the system while the tank is being repaired or painted.

- See PDF for diagram Figure 30. Pitless unit connections for wells with steel well casing pipe.
NOTE: A well casing pipe nipple, 1/2 threaded-1/2 beveled may be used in lieu of a full pipe coupling.

- See PDF for diagram Figure 31. Pitless unit connections for wells with thermoplastic well casing pipe.

- See PDF for diagram Figure 32. Discharge piping arrangements for wells with above-ground discharges.

- See PDF for diagram Figure 33. Pump installations for wells with pitless adapters.

- See PDF for diagram Figure 34. Shallow-well pump installation for a driven-point well. A pressure (box) elbow may be used to extend the pressurized conduit to a point above the basement floor. The pressure (box) elbow may be buried.

- See PDF for diagram Figure 35. Pump installation for a deep well jet pump assembly with a pressure conduit having a concentric piping arrangement. A pressure (box) elbow may be used to extend the pressurized conduit to a point above the basement floor. The pressure (box) elbow may be buried.

- See PDF for diagram Figure 36. Pump installation for a driven point well with a packer jet assembly. A pressure (box) elbow may be used to extend the pressurized conduit to a point above the basement floor. The pressure (box) elbow may be buried.

- See PDF for diagram Figure 36a. Alternate pump installation for a driven point well with a packer jet assembly using a box (ball) elbow. Figure prepared by T. Roos.

- See PDF for diagram Figure 36b. Offset pump installation discharge piping using a buried box (ball) elbow. Figure prepared by T. Roos.

- See PDF for diagram Figure 36c. Alternate offset pump installation discharge piping using a buried box (ball) elbow and seal cross fitting. Figure prepared by T. Roos.

- See PDF for diagram Figure 37. Illustration of requirement that the pump intake shall be installed at least 5 feet above the top of well screen in an unconsolidated formation well.

- See PDF for diagram Figure 38. Pump installations for high capacity wells with lineshaft turbine pumps.

- See PDF for diagram Figure 39. Illustration of a high capacity well pump installation depicting requirements for pumpage and water level measuring devices, well vents and air-relief vacuum breakers.

NR 812.33(1)(b) (b) Pressure tanks larger than 1,000 gallons gross volume. An approval shall be obtained for pressure tanks having a gross volume greater than 1,000 gallons. The department recommends that pressure tanks having a volume greater than 1,000 gallons be installed above ground. When tanks of this size are approved for burial, the head end of the tank shall be cradled in a basement wall or in the wall of an approved pit to provide access and shall be constructed to the specifications for pits described in s. NR 812.36 (2) to provide access to the head of the tank. The pit shall have other additional support cradles. This is depicted in figure 44. Pitless receiver tanks having a volume greater than 1,000 gallons may be installed without an access pit.

NR 812.33(2) (2) Nonpressure storage vessels. Nonpressure storage vessels, other than surge tanks, may not be used without approval. Vessel approval is based on methods of construction and sanitary provisions.

NR 812.33(2)(a) (a) Surge tanks. Surge tanks shall meet the requirements for pressure tanks described in s. NR 812.33 (1).

NR 812.33(2)(b) (b) Reservoirs and elevated storage tanks. A reservoir may be constructed to store water if it is constructed above the groundwater level and in accordance with this paragraph and figure 44A.

NR 812.33(2)(b)1. 1. General construction specifications.

NR 812.33(2)(b)1.a. a. Gravity supply pipes shall be located entirely above grade and shall be conducted to the reservoir through the roof or through the curbing for the manhole. The overflow pipe described in subd. 1. b. may be installed at such a level to provide a free-air gap. Buried supply pipe shall be maintained under a continuous pressure head which is greater than the ground surface elevation.

NR 812.33 Note Note: The department recommends that trees and shrubs not be planted within 25 feet of a reservoir.

NR 812.33(2)(b)1.b. b. An exposed overflow pipe shall be located just under the roof of the reservoir or outside the elevated storage tank and shall extend at least 8 feet away. The overflow pipe shall terminate with a downturned, screened elbow located at least 12 inches above ground grade. The pipe shall discharge onto a splash plate and have sufficient diameter to permit wasting water at a rate in excess of the inflow from the water source.

NR 812.33(2)(b)2. 2. Steel construction specifications. Steel reservoirs or elevated storage tanks shall meet the requirements of AWWA D100-84 for welded construction or AWWA D103-80 for bolted construction.

NR 812.33(2)(b)3. 3. Access. Water storage structures shall be designed with convenient access for cleaning and maintenance.

NR 812.33(2)(b)4. 4. Concrete construction specifications. Reservoirs constructed of concrete shall meet the following specifications:

NR 812.33(2)(b)4.a. a. The supply pipe and overflow pipe shall extend through the structure.

NR 812.33(2)(b)4.b. b. An impervious flexible water stop strip for wall construction joint and a reservoir drain facility shall be installed before the concrete is poured.

NR 812.33(2)(b)4.c. c. The floor of the reservoir shall be reinforced poured concrete with a thickness of at least 6 inches and shall have a curbing wall 6 inches high and 6 inches thick having a keyway or a flexible water stop strip for a construction joint with the walls.

NR 812.33(2)(b)4.d. d. The walls of the reservoir shall be reinforced poured concrete at least 6 inches thick and terminate above the established ground grade.

NR 812.33(2)(b)4.e. e. The roof shall be reinforced poured concrete at least 6 inches thick and shall extend at least 12 inches above established ground grade. An access manhole at least 20 inches in diameter or 20 inches square shall be constructed as an integral part of the roof. The manhole shall have a curbing wall extending at least 12 inches above the roof. The department recommends that the manhole shall be constructed entirely of 4-inch thick reinforced poured concrete, but may be fabricated of 1/4-inch steel or cast iron frame with a gasket and bolted cover. The curbing shall be provided with a snug fitting, overlapping cover with a minimum of 3-inch wide skirted sides. The department recommends that the cover be constructed with welded sheet steel, but may be constructed with reinforced poured concrete. Concrete shall be mixed according to the requirements in s. NR 812.26 (7) (b) 2. or 812.36 (2) (b) 1.

NR 812.33(3) (3) Painting and cathodic protection. Metal surfaces shall be protected by paints or other protective coatings, or by cathodic protective devices. Paint systems shall be consistent with AWWA standard D102 and approved. Cathodic protection shall be designed and installed by competent technical personnel. A copy of the AWWA standards are available for inspection at the office of the department of natural resources, the secretary of state's office and the office of the legislative reference bureau, and may be obtained for personal use from AWWA, Inc., 6666 W. Quincy Avenue, Denver, Colorado 80235.

NR 812.33 History History: Cr. Register, January, 1991, No. 421, eff. 2-1-91; am. (1) (a) (title), 1., (b), (2) (b) 1. a., Register, September, 1994, No. 465, eff. 10-1-94 ; am. (1) (a) (intro.), 1., Register, September, 1996, No. 489, eff. 10-1-96; correction in (3) under s. 13.92 (4) (b) 6., Stats., Register July 2010 No. 655.

NR 812.34 NR 812.34  Sampling faucets. In all pressure water systems, provision shall be made for collection of water samples directly from the well by installation of a sampling faucet before the pressure tank and any water treatment equipment. The sampling faucet shall be installed at least 12 inches above the floor, have a downturned spout and be in an accessible location. All sample faucets shall be metal and shall have a diameter of at least one-quarter inch. The sample faucet shall have a smooth end, or if threaded faucets are used, the threads shall be filed off. Petcocks may not be used as sample faucets except when the spout is at least 1/4 inch in diameter and has a smooth end. When a petcock is installed for a sample tap, an auxiliary, smooth-end faucet shall also be installed to provide a tap for recirculation during batch chlorinations. Sample faucets shall be installed in the pump discharge piping ahead of the pressure tank entry except:

NR 812.34(1) (1) When a buried pressure tank, a pitless receiver tank or an above ground discharge unit is installed, the sampling faucet shall be installed immediately following the point of entry into the building or building basement.

NR 812.34(2) (2) When an approved above ground discharge unit is used and the pressure tank is in the basement, the sampling faucet shall be installed in the service pipe from the tank, at least l2 inches above the floor. The sampling faucet may be placed in the pump discharge line if there is no loss of air from the system when the faucet is opened.

NR 812.34 History History: Cr. Register, January, 1991, No. 421, eff. 2-1-91; am. (intro.), (1), Register, September, 1994, No. 465, eff. 10-1-94.

NR 812.35 NR 812.35  Yard hydrants. Yard hydrants may be installed in a water system provided they are not installed in a well, are at least 8 feet from the well and comply with the requirements of sub. (1) or (2). All backflow prevention devices shall comply with ch. SPS 384 and shall be installed and maintained in accordance with ch. SPS 382.

NR 812.35(1) (1) For yard hydrants with underground bleeds, a reduced pressure principle backflow preventer or a backflow preventer with intermediate atmospheric vent shall be installed in the water supply pipe which services only the yard hydrant or hydrants. Yard hydrants which have underground bleeds and hose threaded outlets shall also have a hose connection vacuum breaker installed on the hose threads.

NR 812.35(2) (2) Yard hydrants without underground bleeds and with hose threaded outlets shall comply with par. (a) or (b).

NR 812.35(2)(a) (a) A hose connection vacuum breaker shall be installed on the hose threads, or

NR 812.35(2)(b) (b) A reduced pressure principle backflow preventer or a backflow preventer with intermediate atmospheric vent shall be installed in the water supply pipe which serves only the yard hydrant or hydrants.

- See PDF for diagram Figure 40. Required watertight concrete pump platform for hand pumps installed outside. The platform shall be mounded
so water does not accumulate around the well casing.

- See PDF for diagram Figure 41. Overflow piping arrangement for a flowing well with a submersible pump.

- See PDF for diagram Figure 42. Flowing well installation with a surge tank instead of an overflow piping arrangement.

NR 812.35(3) (3) Yard hydrants without underground bleeds and without hose threaded outlets may be installed without additional backflow protection if the outlet of the yard hydrants complies with the air gap requirements in s. SPS 382.41.

NR 812.35 Note Note: Chapter SPS 384 requires that backflow prevention devices such as hose connection vacuum breakers, backflow preventers with intermediate atmospheric vent and reduced pressure principle backflow preventers must be reviewed by and receive device approval from department of safety and professional services. Chapter SPS 382 requirements do not allow backflow preventers to be buried or installed in a pit. Installation of hose connection vacuum breakers in areas subject to freezing must be of the type that allows draining. Department of safety and professional services plan approval must be received prior to the installation of a reduced pressure principle backflow preventer. Reduced pressure principle backflow preventers must be installed by a plumber licensed under ch. 145, Stats. and listed by department of safety and professional services to do such work. The device must be tested at least once a year by a department of safety and professional services listed backflow prevention device tester.

NR 812.35 History History: Cr. Register, January, 1991, No. 421, eff. 2-1-91; correction in (intro.) made under s. 13.93 (2m) (b) 12., Stats., Register, September, No. 465; corrections made under s. 13.93 (2m) (b) 4., Stats., Register, September, 1996, No. 489; correction in (intro.) made under s. 13.93 (2m) (b) 7., Stats, Register, May, 2000, No. 533; correction in (intro.), (3) made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672.

NR 812.36 NR 812.36  Pits.

NR 812.36(1) (1)  Approvals to construct pits. A pit structure that is completely or partially below the ground surface or below a building floor used for the housing of wells, offset pumps, pressure tanks or heads of pressure tanks may not be constructed without prior written approval. Subsurface well or pump rooms (alcoves) adjoining a basement are pits. Applications shall be submitted to the department on forms provided by the department. Pits used only for the housing of valves are exempt from the requirements of this section except that a pit used for this purpose shall be watertight, may not be connected to a sewer, shall be drained to permeable soil or to the ground surface and may not be subject to flooding.