- See PDF for diagram PDFFigure 33. Pump installations for wells with pitless adapters.
- See PDF for diagram PDFFigure 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 PDFFigure 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 PDFFigure 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 PDFFigure 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 PDFFigure 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 PDFFigure 38. Pump installations for high capacity wells with lineshaft turbine pumps.
- See PDF for diagram PDFFigure 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 approved, the tank shall be installed according to the requirements of par. (a). 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, designed as part of a potable water supply system, may not be used without approval. Approval is required regardless of whether or not there is a free-air gap in the water inlet line upstream of the vessel. Vessel approval is based on methods of construction and sanitary provisions. The installation of a surge tank is exempt from this approval requirement.
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(2)(b)5. 5. A reservoir shall be located according to the requirements of s. NR 812.08, including the minimum separation distance requirements of s. NR 812.08 (4) established for existing or proposed potential sources of contamination.
NR 812.33(3) (3)Painting and cathodic protection. Metal surfaces of reservoirs or elevated storage tanks, to be in contact with potable water, shall be protected by paints, other protective coatings, or by cathodic protection except when documentation is provided to the department that the source water will not be aggressive or corrosive to the metal surfaces. Paint or coating systems shall conform with AWWA standard D102 and shall be NSF approved for use with potable water. When cathodic protection is to be provided, it 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 revisor of statutes, 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; CR 13-099: am. (1) (a) 1., cr. (1) (a) 2. d., am. (1) (b), (2) (intro.), cr. (2) (b) 5., am. (3), r. and recr. Figures 36b., 36c. Register September 2014 No. 705, eff. 10-1-14.
NR 812.34 NR 812.34Sample faucets. In all pressure water systems, whether installed before or after 1991, provision shall be made for collection of water samples directly from the well by installation of a sampling faucet at or upstream of the pressure tank and upstream of any water treatment equipment. The sample 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 an inside diameter of at least one-quarter inch. The sample faucet shall have a smooth end. Threaded faucets and threaded drain valves may not be installed in place of a smooth end sample faucet even if the threads have been filed off. Petcocks may not be used as sample faucets. Any faucet used for recirculation shall be installed with a hose connection vacuum breaker. Sample faucets shall be installed in the pump discharge piping upstream 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; CR 13-099: am. (title), (intro.) Register September 2014 No. 705, eff. 10-1-14.
NR 812.35 NR 812.35Yard hydrants. Yard hydrants may be installed in a water system provided they are not installed in or on a well and have been approved by the department of safety and professional services for this purpose. 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) Yard hydrants having hose threaded outlets shall either:
NR 812.35(1)(a) (a) Have a hose connection vacuum breaker installed on the hose threads, or
NR 812.35(1)(b) (b) Have a reduced pressure principle backflow preventer or a backflow preventer with intermediate atmospheric vent installed in the water supply pipe which serves only the yard hydrant or hydrants.
- See PDF for diagram PDFFigure 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 PDFFigure 41. Overflow piping arrangement for a flowing well with a submersible pump.
- See PDF for diagram PDFFigure 42. Flowing well installation with a surge tank instead of an overflow piping arrangement.
NR 812.35(2) (2) Yard hydrants 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 Note Note: As the result of an incorrect transcription of the amendment of sub. (2) by CR 13-099, that provision incorrectly read “Yard hydrants having hose threaded outlets...” from 10-1-14 to 11-1-16.
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; CR 13-099: am. (intro.), r. (1), renum. (2), (3) to (1), (2) and am. Register September 2014 No. 705, eff. 10-1-14; CR 13-099 transcription error in (2) corrected Register Otober 2016 No. 730.
NR 812.36 NR 812.36Pits.
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.
NR 812.36(2) (2)Specification for new pits. Pits shall conform to figure 45 and the following minimum specifications:
NR 812.36(2)(a) (a) Dimensions.
NR 812.36(2)(a)1.1. Area. Five square feet of free floor area shall be provided for each square foot of area required for any pump installation equipment. The inside area of a pit may not be less than 24 square feet.
NR 812.36(2)(a)2. 2. Width. The width of the pit shall be not less than 2/3 of the length.
NR 812.36(2)(a)3. 3. Height. The height inside shall be at least 6 feet, but not less than 6 inches higher than any equipment installed in the pit.
NR 812.36(2)(a)4. 4. Walls, floor and roof thicknesses. The wall thickness shall be at least 6 inches and waterproof. The floor thickness shall be at least 4 inches when the floor bears on a footing. Floors used as a wall footing shall be at least 6 inches thick from the outside edge of the floor to a point at least one foot inside the wall of the pit. The roof thickness shall be at least 5 inches.
NR 812.36(2)(b) (b) Construction.
NR 812.36(2)(b)1.1. Material. The pit shall be constructed of reinforced poured concrete thoroughly puddled in place. The concrete shall be prepared according to the specifications of s. NR 812.26 (7) (b) 2. or by using clean water and washed sand and gravel or crushed rock in the following proportions: 1 part cement, 2 parts sand and 3 parts gravel. The water-cement ratio may not exceed 6 gallons of water per 94 pounds of cement. A 6 bag concrete mix per cubic yard with a 28-day design strength of at least 3,000 lbs. per foot and a slump test of no more than 3 inches may be used.
NR 812.36(2)(b)2. 2. Watertight juncture. The junction of walls, floor and roof shall be made watertight by use of water stops or keyed joints. Conduits or similar connection with the pit shall be watertight.
NR 812.36(2)(b)3. 3. Reinforcement. The deck or pit roof and walls of the pit structure shall be reinforced with bars or wire mesh to insure strength and durability.
NR 812.36(2)(b)4. 4. Elevation of pit roof. The pit roof, deck or wall top shall be above the ground surface.
NR 812.36(2)(c) (c) Manhole opening.
NR 812.36(2)(c)1.1. Placement. The pit shall be provided with a manhole opening. The opening shall be located directly over the well, unless the well casing pipe itself extends through the roof, or if a capped section of well casing pipe at least equal in diameter to the well casing pipe is cast into the pit roof directly over the well.
NR 812.36(2)(c)2. 2. Size. The manhole opening shall be at least 20 inches square or 20 inches in diameter and shall be sufficiently large to allow entrance or removal of any unit or equipment to be installed in the pit.
NR 812.36(2)(c)3. 3. Curbing. The manhole opening shall be provided with a raised concrete curbing at least 4 inches thick. The curbing shall extend at least 4 inches above the pit roof.
NR 812.36(2)(c)4. 4. Cover. A structurally substantial, watertight, overlapping, tight-fitting, cover with skirted sides at least 3 inches high shall be provided for the manhole. The department recommends that a welded sheet steel cover be used, but a cover made out of lumber and covered in turn with sheet metal or tin may be acceptable if waterproof.
NR 812.36(2)(c)5. 5. Exceptions. A watertight, cast iron manhole frame and cover with a gasket may be substituted for a curbed manhole. When the pit is a subsurface pumproom (alcove) adjoining a basement foundation, a watertight concrete plug may be substituted for a curbed manhole if the roof of the pit terminates in a walkway, breezeway, patio or porch, providing the pit is reasonably accessible.
- See PDF for diagram PDFFigure 43. Overflow piping arrangement for a flowing well with a surge tank and with no pump.
NR 812.36(2)(d) (d) Drainage.
NR 812.36(2)(d)1.1. Gravity drain. The pit shall be drained by a watertight gravity drain discharging to the ground surface at a point at least 8 feet from the well. The drain shall be constructed of materials conforming to ch. SPS 384 and shall have a minimum diameter of 2 inches with a screened outlet.
NR 812.36(2)(d)2. 2. Pits adjoining basements (alcoves). The subsurface pumproom pit may be drained to the basement floor if the pit floor slopes toward the basement and if the basement is adequately drained. If the basement is not adequately drained, a gravity drain shall be provided for the pit. The pit floor shall be one foot above the basement floor.
NR 812.36 Note Note: Pits adjoining basements (alcoves) are “subsurface pumprooms".
NR 812.36(2)(e) (e) Termination of well casing pipe. The well casing pipe shall terminate at least 12 inches above the pit floor and be provided with an approved watertight seal.
NR 812.36(2)(f) (f) Venting.
NR 812.36(2)(f)1.1. Pit. A pit should be vented with 2, 2-inch diameter or larger galvanized steel pipes located in opposite corners, one pipe to extend to within one foot of the pit floor and the other to extend only through the pit roof. If used, the upper end of the vent pipes shall terminate with return bends and screened outlets.
NR 812.36(2)(f)2. 2. Well. The well vent pipe shall extend to the top of the pit and terminate with a return bend and a screened outlet.
NR 812.36(2)(g) (g) Pump installation. The free space in the pit around the well casing pipe shall be maintained so that the top of the well casing pipe is readily accessible for installation, adjustment or removal of an approved well seal and for the installation and removal of the pump or piping.
NR 812.36(3) (3)Driveway ramps. If a well must be located in a driveway, parking area, walkway or other high traffic area due to small lot size, accessibility constraints or inability to otherwise meet the minimum separation distance requirements of s. NR 812.08, the well may be contained within a driveway ramp structure without department approval provided the driveway ramp meets the specifications of this subsection.
NR 812.36(3)(a) (a) Relation to floodplain. Driveway ramps may not be constructed in a floodway or floodplain.
NR 812.36(3)(b) (b) Construction specifications. Driveway ramps shall conform to figure 45 and the following minimum specifications:
NR 812.36(3)(b)1. 1. `Nonpressure conduit'. If the well has a nonpressure conduit, the pump installer shall evaluate the integrity of the nonpressure conduit and its connection to the well casing pipe by performing a pressure test. If the nonpressure conduit fails the pressure test, the nonpressure conduit shall be eliminated and the installation shall be changed to a pitless connection in accordance with s. NR 812.42 (11) (e).
NR 812.36(3)(b)2. 2. `Construction'. The top of the well shall be contained within a manhole and frame that is set on a concrete ring. The manhole shall be water-tight with a gasketed seal and shall be bolted securely to the frame. The manhole must be surrounded by concrete or asphalt that is sloped so that surface water does not flow toward or pond on the manhole cover.
NR 812.36(3)(b)3. 3. `Height of well'. The top of the well casing pipe shall terminate a minimum of four inches above the original grade of the driveway, parking lot or sidewalk.
NR 812.36(3)(b)4. 4. `Well seal'. The top of the well shall be sealed watertight with an approved sanitary well seal.
NR 812.36(3)(b)5. 5. `Conduit for electrical cable'. Pump electrical cable shall be protected in a metal or plastic conduit. The conduit shall be threaded tightly into the well cap or seal or shall be sealed in an equivalent manner. If the electrical wires are buried beside the well, the bottom of the conduit shall extend below the floor of the driveway ramp and shall be sealed watertight. If the conduit extends from the well seal to a basement, the end of the conduit shall be sealed in a watertight, vermin-proof manner.
NR 812.36(3)(b)6. 6. Wells with nonpressure conduits must be vented to the ceiling in the basement and shall have the pump cables enter through a conduit.
Figure 45A: Well Driveway Ramp
Figure 45B. Acceptable Driveway Ramp Installation
NR 812.36 History History: Cr. Register, January, 1991, No. 421, eff. 2-1-91; am. (1), Register, September, 1994, No. 465, eff. 10-1-94; correction in (2) (d) 1. made under s. 13.93 (2m) (b) 7., Stats., Register, May, 2000, No. 533; correction in (2) (d) 1. made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672; CR 13-099: cr. (3), Figures 45A, 45B Register September 2014 No. 705, eff. 10-1-14.
NR 812.37 NR 812.37Water treatment.
NR 812.37(1) (1)Scope. This section applies to treatment of water for potable use in a private or noncommunity water system except for the disinfection treatment, batch chlorination, and acidification prescribed in ss. NR 812.22 and 812.41.
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Published under s. 35.93, Stats. Updated on the first day of each month. Entire code is always current. The Register date on each page is the date the chapter was last published.