Section SPS 382.35 - Cleanouts(1) SCOPE. The provisions of this section set forth the requirements for the installation of cleanouts and manholes for all drain piping.(2) MATERIALS. Cleanouts shall be constructed of approved materials in accordance with ch. SPS 384.(3) WHERE REQUIRED. (a)Horizontal drains. Except as permitted under s. SPS 382.33 (9) (fm), all gravity horizontal drains within or under a building shall be accessible through a cleanout in accordance with one of the following requirements:1. The developed length of drain piping between cleanouts for above-ground piping may not exceed 75 feet.2. The developed length of drain piping between cleanouts for below ground piping 2 inches or less in diameter may not exceed 40 feet.3. The developed length of drain piping between cleanouts for below ground piping greater than 2 inches in diameter may not exceed 75 feet. Note: See ch. SPS 382 Appendix for further explanatory material.
(b)Sanitary building sewers.1. Sanitary building sewers 6" or less in diameter shall be provided with cleanouts or manholes such that: a. Cleanouts are located not more than 100 feet apart;b. Manholes are located not more than 400 feet apart;c. The distance from a cleanout to a manhole located upstream is not more than 200 feet; ord. The distance from a manhole to a cleanout located upstream is not more than 300 feet.2. Sanitary building sewers 8" or larger in diameter shall be provided with manholes at: a. Every horizontal change in direction of more than 45 degrees where the change in direction is created within a distance of less than 10 feet;b. Every change in pipe diameters where both connections are 8 inches or larger; andc. Intervals of not more than 400 feet.(c)Storm building sewers.1. Storm building sewers 10" or less in diameter shall be provided with cleanouts or manholes such that: a. Cleanouts are located not more than 100 feet apart;b. Manholes are located not more than 400 feet apart;c. The distance from a cleanout to a manhole located upstream is not more than 200 feet; ord. The distance from a manhole to a cleanout located upstream is not more than 300 feet.2. Storm building sewers 12" or larger in diameter shall be provided with manholes or storm drain inlets with an inside diameter of at least 36" at: a. Every horizontal change in direction of more than 45 degrees where the change in direction is created within a distance of less than 10 feet,b. Every change in pipe diameter where both connections are 12 inches or larger, andc. Intervals of not more than 400 feet.(d)Private interceptor main sewers.1. Private interceptor main sewers 56 or less in diameter shall be provided with an exterior cleanout or manhole upstream of the point of the creation of the private interceptor main sewer and such that: a. Cleanouts are located not more than 100 feet apart;b. Manholes are located not more than 400 feet apart;c. The distance from a cleanout to a manhole located upstream is not more than 200 feet; ord. The distance from a manhole to a cleanout located upstream is not more than 300 feet.2. Private interceptor main sewers 66 or larger in diameter shall be provided with a manhole at: a. The most upstream point of the private interceptor main sewer;b. Every horizontal change in direction of more than 45 degrees where the change in direction is created within a distance of less than 10 feet,c. Every change in pipe diameter where both connections are 6 inches or larger, andd. Intervals of not more than 400 feet.(e)Junction of building drain and building sewer. A cleanout shall be provided near the junction of a building drain and a building sewer. 1. The cleanout shall be located within 5 feet of where the building drain and the building sewer connect. The cleanout may be located either inside or outside the building.2. A cleanout in a drain stack may serve as the cleanout at the junction of the building drain and building sewer, if the stack is within 5 feet of where the building drain and building sewer connect.(f)Stacks. Where a cleanout is provided in a drain stack, the cleanout shall be located not more than 60 inches above the lowest floor penetrated by the stack.(g)Branches.1. Except as provided in subd. 2., cleanouts shall be provided in connection with batteries of fixtures at such points that all parts of the branch drain may be accessible for cleaning or removal of stoppages. For the purposes of this requirement, removable fixture traps may serve as cleanout openings.2. A cleanout shall not be required for a branch drain when the fixtures on the branch include one floor outlet fixture and any fixtures discharging into an accompanying wet vent.(h)Greasy wastes. Drain pipes carrying greasy wastes shall be provided with cleanouts located not more than 40 feet apart and at all changes in direction of more than 45°.(i)Double sanitary tees. A cleanout shall be provided immediately above or below a double sanitary tee drain fitting which is installed in a vertical drain pipe of less than 3" in diameter, unless a stack cleanout is provided in accordance with par. (f).(j)Traps and fixture drains.1. All traps shall be constructed or installed so that stoppages may be removed from the traps and the horizontal portions of fixture drains.2. If a trap is not accessible for removal or does not contain a removable dip, a cleanout or a removable inlet shall be installed to enable cleaning of the trap passageway and the horizontal portions of the fixture drain.(k)Conductors. Where a cleanout is provided in a conductor, the cleanout shall be located 28 to 60" above the lowest floor penetrated by the conductor.(l)Sampling manholes. Municipalities or sanitary sewage districts by ordinance or rule may require the installation of sampling manholes for periodic sewage monitoring. Note: The installation of sampling manholes may be needed for the monitoring of industrial wastes under chs. NR 200 to 299. See ch. SPS 382 Appendix for further explanatory material.
(m)Catch basins and interceptors. The fixture drain from all interceptors designed in accordance with s. SPS 382.34 (4) (a) 2. shall be provided with an accessible cleanout located outside of the basin and not more than 15 inches from the weir of the trap.(4) DIRECTION OF FLOW. Every cleanout shall be installed so as to open in the direction of the waste flow or at a right angle thereto.(5) ACCESSIBILITY. Cleanout plugs shall not be covered with cement, plaster, or any other similar permanent finishing material.(a)Underground piping. Cleanouts installed in underground drain piping shall be extended vertically to or above the finish grade. 1. All interior and exterior cleanouts where the vertical distance between the horizontal drain pipe being served and the top of the cleanout opening exceeds 18 inches in length, shall connect to the drain piping through a fitting as specified in Table 382.30-4.2. A cleanout located outside of a building shall be provided with a frost sleeve.a. The frost sleeve shall be of a material approved for building sewers in accordance with s. SPS 384.30 (2) (c).b. Where a cleanout is located in an area subject to vehicular traffic the top of the frost sleeve shall terminate in a concrete pad at least 4" thick and extending at least 9" from the sleeve on all sides, sloping away from the sleeve.c. The bottom of the frost sleeve shall terminate 6" to 12" above the top of the drain piping or at least 6" below the predicted frost depth in accordance with s. SPS 382.30 Table 382.30-6.d. The frost sleeve shall have a removable watertight top of sufficient thickness and strength to sustain the weight of anticipated traffic. Note: See ch. SPS 382 Appendix for further explanatory material.
(b)Concealed piping. Cleanout access for drain piping located in concealed spaces shall be provided by either extending the cleanout to at least the surface of a wall or floor or by providing access panels of a sufficient size to permit removal of the cleanout plug and proper cleaning of the pipe.(6) CLEANOUT SIZE. (a) Cleanouts and cleanout extensions shall be sized in accordance with Table 382.35, except as provided in par. (b).(b) The replacement or repair of a non-public 6-inch sanitary sewer may be served by an existing 4-inch extension within the building. Table 382.35
Cleanout Sizes
Diameter of Pipe Served by Cleanout (inches) | Minimum Diameter of Cleanout Extension (inches) | Minimum Diameter of Cleanout Opening (inches) |
1¼ | 1¼ | 1¼ |
1½ | 1½ | 1¼ |
2 | 1½ | 1½ |
3 | 3 | 2½ |
4 | 4 | 3½ |
5 | 5 | 4 |
6 | 6 | 5 |
8 and larger | 6 | 6 |
(7) PROHIBITED USE OF CLEANOUT OPENINGS. Cleanout openings shall not be used for the installation of fixtures or floor drains, except where another cleanout of equal access and capacity is provided.(8) MANHOLES. (a)Diameter. The minimum diameter of manholes shall be 42 inches. A manhole shall have a minimum access opening of 23 inches.(b)Materials. Manholes shall be constructed of approved materials in accordance with ch. SPS 384 and in accordance with the design provisions of s. NR 110.13. Note: The provisions of s. NR 110.13 regarding the manhole's flow channel, watertightness, and drop pipe indicate the following specifications:
__The flow channel through manholes shall be made to conform to the shape and slope of the sewer.
-Solid watertight manhole covers are to be used wherever the manhole tops may be flooded by street runoff or high water. Where groundwater conditions are unfavorable, manholes of brick or block shall be waterproofed on the exterior with plastic coatings supplemented by a bituminous waterproof coating or other approved coatings. Inlet and outlet pipes are to be joined to the manhole with a gasketed flexible watertight connection or any watertight connection arrangement that allows differential settlement of the pipe and manhole wall to take place.
-An outside drop pipe is to be provided for a sewer entering a manhole where the invert elevation of the entering sewer is 2 feet or more above the spring line of the outgoing sewer. The entire drop connection shall be encased in the concrete. Inside drop connection may be approved on a case-by-case basis.
Wis. Admin. Code Department of Safety and Professional Services § SPS 382.35
Cr. Register, February, 1985, No. 350, eff. 3-1-85; am. (3) (i), r. and recr. (3) (j), Register, May, 1988, No. 389, eff. 6-1-88; am. (5) (a) 2. a., Register, August, 1991, No. 428, eff. 9-1-91; r. and recr. (3) (j) and (5) (a) 2. c., Register, February, 1994, No. 458, eff. 3-1-94; CR 02-002: am. (3) (a) and (d) 1. (intro.), renum. (3) (g) to be (3) (g) 1. and am., cr. (3) (g) 2. and (m), r. and recr. (5) (a) 1. Register April 2003 No. 568, eff. 5-1-03; CR 08-055: r. and recr. (3) (a), am. (3) (b) 2. a., b., (c) 2. a., b., (d) 2. b., c., (5) (a) 1. and Table 82.35 Register February 2009 No. 638, eff. 3-1-09; correction in (2), (3) (m), (5) (a) 1., 2. a., c., (6), (8) (b) made under s. 13.92(4) (b) 7, Stats., Register December 2011 No. 672.Amended by, CR 23-006: am. (3) (a) (intro.), (f), r. and recr. (6), am. (8) (a) Register September 2023 No. 813, eff. 10-1-23.; correction in (6) (b) made under s. 35.17, Stats, Register September 2023 No. 813, eff. 10/1/2023See ch. SPS 382 Appendix for further explanatory material.