SPS 382.31(15) (15)Vent grades and connections.
SPS 382.31(15)(a)(a) Vent grade. All vent and branch vent pipes shall be graded and connected so as to drain back to a drain pipe by means of gravity.
SPS 382.31(15)(b) (b) Installation. Vents shall be installed in accordance with subds. 1. to 3.
SPS 382.31(15)(b)1. 1. Except for wet vent piping, the connection of a vent to horizontal drain piping shall be at a point above the horizontal center line of the drain piping.
SPS 382.31(15)(b)2. 2. Except as provided in subs. (12) and (17), vent piping serving a wall-outlet fixture may not offset horizontally less than 36" above the floor, but in no case lower than the elevation of the highest flood level rim of any fixture served by the vent.
SPS 382.31(15)(b)3. 3. Vent piping may not connect to a branch vent less than 38" above the floor, but in no case lower than 2" above the elevation of the highest flood level rim of any fixture served by the vent.
SPS 382.31 Note Note: See ch. SPS 382 Appendix for further explanatory material.
SPS 382.31(16) (16)Vent terminals. All vents and vent systems shall terminate in the open air in accordance with this subsection.
SPS 382.31(16)(a) (a) Extension above roofs. Extensions of vents through a roof shall terminate at least 8" above the roof. Where the roof is to be used for any purpose other than weather protection, the vents shall extend at least 7 feet above the roof.
SPS 382.31(16)(b) (b) Waterproof flashings. The penetration of a roof system by a vent shall be made watertight with an approved flashing.
SPS 382.31(16)(c) (c) Prohibited uses. Vent terminals shall not be used as flag poles, support for antennas or other similar purposes.
SPS 382.31(16)(d) (d) Location of vent terminals.
SPS 382.31(16)(d)1.1. A vent shall not terminate under the overhang of a building.
SPS 382.31(16)(d)2. 2. All vent terminals shall be located:
SPS 382.31(16)(d)2.a. a. At least 10 feet from an air intake;
SPS 382.31(16)(d)2.b. b. At least 5 feet from a power exhaust vent;
SPS 382.31(16)(d)2.c. c. At least 10 feet horizontally from or 2 feet above roof scuttles, doors and openable windows; and
SPS 382.31(16)(d)2.d. d. At least 5 feet from or 2 inches above parapet walls.
SPS 382.31(16)(d)3. 3. Where a structure has an earth covered roof extending from surrounding grade, the vent extension shall run at least 7 feet above grade and terminate with an approved vent cap. The portion of vent pipe outside the structure shall be without joints, except one fitting may be installed where the pipe leaves the top or side of the structure.
SPS 382.31(16)(e) (e) Extension through wall. Where approved by the department, a vent may terminate through an exterior wall. Such a vent shall terminate at least 10 feet horizontally from any lot line and shall terminate downward. The vent shall be screened and shall comply with par. (d).
SPS 382.31(16)(f) (f) Extensions outside buildings. Drain or vent pipe extensions shall not be located or placed on the outside of an exterior wall of any new building, but shall be located inside the building.
SPS 382.31(16)(g) (g) Frost closure. For protection against frost closure, each vent terminal shall be at least 2" in diameter. Where it is necessary to increase the diameter of the vent, the change in diameter shall be made at least 6" inside the building.
SPS 382.31 Note Note: See ch. SPS 382 Appendix for further explanatory material.
SPS 382.31(16)(h) (h) Penetrations through grade. Except when installation is in accordance with par. (d) 3., penetrations through grade shall terminate at least 12" above finished grade and terminate with a vent cap or return bend.
SPS 382.31(17) (17)Combination drain and vent systems. In lieu of providing individual vents, fixtures may be vented in accordance with pars. (a) to (c).
SPS 382.31(17)(a) (a) Stacks.
SPS 382.31(17)(a)1.1. A drain stack may serve as a combination drain and vent system for fixtures in accordance with subd. 1. a. to e.
SPS 382.31(17)(a)1.a. a. The drain stack shall not serve more than 3 fixtures. Each fixture shall be located on a separate floor level.
SPS 382.31(17)(a)1.b. b. The drain stack shall be limited to serving fixtures with a drainage fixture unit value of no greater than 2.0. A urinal may not discharge into the combination drain and vent portion of the stack. The largest drainage fixture unit value served by the stack shall determine the stack size as specified in Table 382.31-5.
SPS 382.31(17)(a)1.c. c. The drain stack shall not be offset horizontally above the lowest fixture drain connection.
SPS 382.31(17)(a)1.d. d. The developed length of any fixture drain from the trap weir to the drain stack shall not exceed the limits specified in Table 382.31-1.
SPS 382.31(17)(a)1.e. e. The drain stack and its attendant vent shall be sized in accordance with Table 382.31-5.
SPS 382.31 Note Note: See ch. SPS 382 Appendix for further explanatory material. - See PDF for table PDF
SPS 382.31(17)(a)2. 2. A drain stack may serve as a combination drain and vent system for a kitchen sink and a wall outlet fixture with a drainage fixture unit value of 2 or less in accordance with subd. 2. a. to d.
SPS 382.31(17)(a)2.a. a. One kitchen sink within a dwelling unit, with or without a food waste grinder or dishwasher connection, shall connect to the drain stack above the wall outlet fixture with a drainage fixture unit value of 2 or less. No other fixtures may connect to the drain stack.
SPS 382.31(17)(a)2.b. b. The drain stack shall be at least 2 inches in diameter below the kitchen sink connection and it shall be at least 4 inches in diameter below the connection to the lower fixture.
SPS 382.31(17)(a)2.c. c. In lieu of the minimum sizes as required in subd. 2. b., the entire stack below the kitchen sink connection may be 3 inches in diameter.
SPS 382.31(17)(a)2.d. d. The drain stack shall not offset horizontally above the fixture drain connection for the lower fixture.
SPS 382.31(17)(b) (b) Building drains. A building drain or a building subdrain may serve as a combination drain and vent system for floor drains and floor outlet fixtures in accordance with subds. 1. to 6.
SPS 382.31(17)(b)1. 1. A vent or drain at least 2 inches in diameter shall be connected upstream of any building drain branch or building subdrain branch.
SPS 382.31(17)(b)2. 2. No more than 2 water closets may connect to the building drain or building subdrain by means of building drain branches or building subdrain branches.
SPS 382.31(17)(b)3.a.a. That portion of the building drain or building subdrain between the connection of the building drain branch or building subdrain branch and the vent or drain required in subd. 1. shall be at least one pipe size larger than the minimum size permitted in Table 382.30–3 based on the total drainage fixture unit load, but not less than 3 inches.
SPS 382.31(17)(b)3.b. b. The vent or drain required in subd. 1. shall be at least one-half the diameter of that portion of the building drain or building subdrain which is vented by the vent or drain, but may not be less than 2 inches in diameter.
SPS 382.31(17)(b)3.c. c. A vent serving a drain required in subd. 1., shall be at least one half the diameter of that portion of the building drain or building subdrain which is vented by the system, but may not be less than 2 inches in diameter.
SPS 382.31(17)(b)4. 4. The trap of a floor drain or a floor outlet fixture, except a water closet, connected to a building drain branch or building subdrain branch shall be at least 3" in diameter.
SPS 382.31(17)(b)5. 5. A building drain branch or building subdrain branch may not connect to a building drain or building subdrain downstream from the base fitting of a drain stack 2" or larger in diameter within the distance equal to 20 pipe diameters of the building drain or building subdrain.
SPS 382.31(17)(b)6. 6. The pitch and the developed length of the building drain branch or building subdrain branch may not exceed the limits specified in Table 382.31-1.
SPS 382.31 Note Note: See ch. SPS 382 Appendix for further explanatory material.
SPS 382.31(17)(c) (c) Laboratory sink venting. A horizontal drain may serve as a combination drain and vent system for island laboratory sinks in accordance with subds. 1. to 7.
SPS 382.31(17)(c)1. 1. A vent stack or a drain stack at least 2" in diameter shall be connected upstream of any fixture drain vented by the combination drain and vent system.
SPS 382.31(17)(c)2.a.a. That portion of the horizontal drain between the connection of fixture drain and the vent stack or drain stack required in subd. 1. shall be at least one pipe size larger than the minimum size permitted in Table 382.30-2 based on total drainage fixture unit load.
SPS 382.31(17)(c)2.b. b. The vent stack or drain stack required in subd. 1. shall be at least one-half the diameter of that portion of the horizontal drain which is vented by the stack, but may not be less than 2 in diameter.
SPS 382.31(17)(c)2.c. c. A stack vent serving a drain stack required in subd. 1. shall be at least one half the diameter of that portion of the horizontal drain which is vented by the stack, but may not be less than 2" in diameter.
SPS 382.31(17)(c)3. 3. All fixture drains vented by the horizontal drain shall be at least 3" in diameter.
SPS 382.31(17)(c)4. 4. Fixture drains to be vented by the horizontal drain shall connect individually to the horizontal drain.
SPS 382.31(17)(c)5. 5. An individual vent or common vent shall be extended as high as possible under the sink enclosure and then returned vertically downward and connected to the horizontal drain. A cleanout shall be provided on the vent piping.
SPS 382.31(17)(c)6. 6. In lieu of connecting the vent to the horizontal drain which forms the combination drain and vent system, the vent may connect to a horizontal fixture drain vented by the combination drain and vent system. The pitch and developed length of the horizontal fixture drain shall not exceed the limits specified in Table 382.31-1.
SPS 382.31(17)(c)7. 7. Fixture drains to be vented by the horizontal drain shall not connect to a horizontal drain downstream from the base fitting of a drain stack 2" or larger in diameter within the distance equal to 20 pipe diameters of the horizontal drain serving the stack.
SPS 382.31 Note Note: See ch. SPS 382 Appendix for further explanatory material.
SPS 382.31(18) (18)Prohibited uses. A vent or vent system shall not be used for purposes other than the venting of the plumbing system.
SPS 382.31(18)(a) (a) Boiler blowoff basin vents. Vent piping from boiler blowoff basins shall not be connected to a vent or vent system serving a sanitary drain system, storm drain system or chemical waste system.
SPS 382.31(18)(b) (b) Chemical waste vents. Vent piping for chemical waste systems shall not be connected to a vent system serving a sanitary drain system or storm drain system.
SPS 382.31(18)(c) (c) Steam vents. Vents serving steam operated sterilizers, cleansing or degreasing equipment, pressing machines or any other apparatus which normally discharges steam into the vent shall not be connected to a vent or a vent system serving a sanitary drain system, storm drain system or chemical waste system.
SPS 382.31 History History: Cr. Register, February, 1985, No. 350, eff. 3-1-85; am. (11) (a), (17) (b) 3. b. and (c) 2. b., r. and recr. (11) (b), r. (13) (a) 2., cr. (17) (b) 3. c. and (c) 2. c., Register, May, 1988, No. 389, eff. 6-1-88; reprinted to correct (17) (c) 4., Register, February, 1991, No. 422; cr. (4) (b) 4. and (17) (a) l. f., r. and recr. (5) (c) l. c. and (17) (c) 4., am. (5) (c) 2. c., (10) (intro.), (b) 1., (11) (b), (17) (a) l. e. and (17) (b), Register, August, 1991, No. 428, eff. 9-1-91; am. (6) (c), (7) (b), (10) (intro.), (a), (b) 1., (e), (13) (a) 1. c., (c) (intro.), 1. and 4., r. (16) (h), Register, February, 1994, No. 458, eff. 3-1-94; CR 02-002: renum. (8) to be (8) (a) and am., cr. (8) (b), (14) (j) and (16) (h), am. (11) (a), (12) (intro.), (a), (13) (c) 1. (17) (a) 1. (intro.) to b., and Table 82.31-4, r. and recr. Table 82.31-5, Register April 2003 No. 568, eff. 5-1-03; CR 08-055: am. (4) (a), (10) (c), (13) (a) 1. e., (14) (g) 2., (17) (a) 1. e., (b) 1. and 3., r. and recr. (5) and (6), r. (17) (a) 1. f. Register February 2009 No. 638, eff. 3-1-09; correction in (17) (a) 1. (intro.) made under s. 13.92 (4) (b) 7., Stats., Register February 2009 No. 638; CR 10-064: am. (5) (a) 2., (6) (c), (17) (a) 2., r. (14) (g) 2., renum. (14) (g) 3. and 4. to be (14) (g) 2. and 3. Register December 2010 No. 660, eff. 1-1-11; correction in (14) (g) (intro.) made under s. 13.92 (4) (b) 7., Stats., Register December 2010 No. 660; correction in (2), (5) (a) 2., (9) (a) 1., 2., (12) (d), (14) (a) (intro.), (b) 1., (c), (d), (e), (f), (g) 1., 2., 3., (i) 1. a., b., (j), (17) (a) 1. b., d., e., (b) 3. a., 6., (c) 2. a., 6. made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672.
SPS 382.32 SPS 382.32 Traps and direct fixture connections.
SPS 382.32(1)(1) Scope. The provisions of this section set forth the requirements for the types and installation of traps and direct fixture connections.
SPS 382.32(2) (2)Materials. All traps and fixture connections shall be of approved materials in accordance with ch. SPS 384.
SPS 382.32(3) (3)General. Each plumbing fixture, each compartment of a plumbing fixture and each floor drain shall be separately trapped by a water seal trap, except as provided in par. (a) or as otherwise permitted by this chapter. A fixture shall not be double trapped.
SPS 382.32(3)(a) (a) Trap exceptions. The plumbing fixtures listed in subds. 1. to 3. shall not be required to be separately trapped:
SPS 382.32(3)(a)1. 1. Fixtures having integral traps;
SPS 382.32(3)(a)2. 2. Compartments of a combination plumbing fixture installed on one trap, provided:
SPS 382.32(3)(a)2.a. a. No compartment is more than 6" deeper than any other;
SPS 382.32(3)(a)2.b. b. The distance between the compartments' waste outlets farthest apart does not exceed 30"; and
SPS 382.32(3)(a)2.c. c. No compartment waste outlet is equipped with a food waste grinder.
SPS 382.32(3)(a)3. 3. Storm drains as provided in s. SPS 382.36 (12) (a).
SPS 382.32(3)(b) (b) Trap seals. Each trap shall provide a liquid seal depth of not less than 2" and not more than 4", except as otherwise specified in this chapter.
SPS 382.32(3)(c) (c) Loss of trap seal. A trap seal primer valve may be installed on a trap subject to high rates of evaporation.
SPS 382.32(3)(c)1. 1. A trap seal primer valve or other means of trap seal protection acceptable to the department shall be provided for a trap subject to seal loss due to evaporation.
SPS 382.32 Note Note: Liquids acceptable to use for reducing trap seal evaporation include mineral oil, vegetable oil, propylene glycol and glycerin.
SPS 382.32(3)(c)2. 2. Trap seal primer valves shall conform to ASSE 1018.
SPS 382.32 Note Note: A list of referenced standards is contained in ch. SPS 381.
SPS 382.32(3)(d) (d) Design. Traps shall be self-scouring and shall not have interior partitions, except where such traps are integral with the fixture. Uniform diameter P-traps shall be considered self-scouring.
SPS 382.32(3)(e) (e) Size. Traps shall be of diameters not less than those specified in Table 382.30-1 of s. SPS 382.30.
SPS 382.32(3)(f) (f) Prohibited traps. The installation of the types of traps listed in subds. 1. to 6. shall be prohibited:
SPS 382.32(3)(f)1. 1. Bell traps;
SPS 382.32(3)(f)2. 2. Drum traps, except where specifically approved by the department;
SPS 382.32(3)(f)3. 3. S-traps which are not integral parts of fixtures;
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Published under authority of s. 35.93, Stats. Updated on the first day of each month. Entire code is alwaycurrent. The date shown on each chapter is the date the chapter was last published.