Chapter SPS 382

SPS 382.31(17)(d)4. 4. Elevator threshold drains, provided with individual traps that utilize other means of venting, are permitted to discharge into the stack.

SPS 382.31(17)(d)5. 5. The drain stack shall be limited to serving elevators threshold drains serving elevator door areas.

SPS 382.31(17)(d)6. 6. The developed length of any trap weir vented by the stack to the drain stack may not exceed the limits specified in Table 382.31-1.

SPS 382.31(17)(d)7. 7. A vent, at least 3 inches in diameter and not less than ½ the diameter of the largest portion of the drain stack, shall extend from immediately above the highest branch connection to a vent terminal in accordance with sub. (16).

SPS 382.31 Note Note: See ch. SPS 382 appendix for further explanatory material.

SPS 382.31(17m) (17m) Air admittance valves. The use of air admittance valves in lieu of traditional venting shall comply with all of the following:

SPS 382.31(17m)(a) (a) The AAV may only serve as a termination point for a branch vent, circuit vent, common vent, individual vent, wet vent or combination drain and vent system. The AAV may serve a pumped-discharge type clothes washer standpipe when the fixture drain downstream of the point of vent is at least 3 inches in diameter.

SPS 382.31(17m)(b) (b) Branches that have fixtures served by the AAV, and when connected to a stack that has 4 or more branch intervals above the branch connection, must be provided with a relief vent located between the most downstream fixture and the stack.

SPS 382.31(17m)(c) (c) The AAV may not serve as a vent termination point for any of the following:

SPS 382.31(17m)(c)1. 1. Areas of negative pressure such as parking garages, laboratories, and research facilities.

SPS 382.31(17m)(c)2. 2. A commercial parking structure.

SPS 382.31(17m)(c)3. 3. Vents installed to relieve positive pressures.

SPS 382.31(17m)(c)4. 4. A fixture serving a chemical waste system.

SPS 382.31(17m)(c)5. 5. POWTS components such as a holding tank or treatment tank.

SPS 382.31(17m)(c)6. 6. A stack vent serving two or more branch intervals.

SPS 382.31(17m)(c)7. 7. A vent stack that is required in accordance with s. SPS 382.31 (4) (a).

SPS 382.31(17m)(c)8. 8. A vent serving a sump.

SPS 382.31(17m)(c)9. 9. An enclosed stairwell.

SPS 382.31(17m)(c)10. 10. An area utilized as supply or return air plenum.

SPS 382.31(17m)(c)11. 11. A pit, vault, or depression which is below the adjacent grade or floor level.

SPS 382.31(17m)(c)12. 12. Plumbing wastewater and treatment devices used to treat fats, oils & grease (FOG).

SPS 382.31(17m)(c)13. 13. An area that subjects the valve to grease or other materials which could cause fouling of the valve’s seal.

SPS 382.31(17m)(c)14. 14. Clean rooms such as FDA or DATCP regulated food and beverage production areas, bio safety labs, pharmaceutical production, and pharmaceutical processing facilities.

SPS 382.31 Note Note: For specific applications not listed, please contact DSPS Division of Industry Services at P.O. Box 7162, Madison, WI 53707-7162; or at telephone [phone] or [phone] or 711 (Telecommunications Relay); or at the Division’s Website at http://dsps.wi.gov/programs/industry-services.

SPS 382.31(17m)(c)15. 15. A health care facility as defined is s. SPS 381.01 (116).

SPS 382.31(17m)(c)16. 16. A restaurant kitchen licensed by the state or local department of health.

SPS 382.31(17m)(c)17. 17. A residential bedroom.

SPS 382.31 Note Note: Does not include closets or bathrooms with solid doors in accordance with Standard International Building Code s. 508.2.3.

SPS 382.31(17m)(c)18. 18. A daycare.

SPS 382.31(17m)(d) (d) The size and developed length for a vent using an AAV shall conform with Table 382.31-6.

- See PDF for table

a Drainage Fixture Units based on ch. SPS 382.

b NL means no limit.

c NP means not permitted.

d Not more than two water closets or similar type fixtures of four or more drainage fixture units.

SPS 382.31(17m)(e) (e) The installation of the AAV shall conform with all of the following:

SPS 382.31(17m)(e)1. 1. The AAV must be installed in the vertical position, plus or minus 15 degrees from plumb.

SPS 382.31(17m)(e)2. 2. The vent system being served by the AAV may have horizontal offsets located less than 36 inches above the floor on which the fixtures are installed provided the vent does not connect to another vent.

SPS 382.31(17m)(e)3. 3. The installation location of the AAV shall conform with all of the following:

SPS 382.31(17m)(e)3.a. a. A minimum of 4 inches above the top of the horizontal pipe being served (See Note).

SPS 382.31(17m)(e)3.b. b. No more than 20 inches below the flood rim of any fixture served by this product (See Note).

SPS 382.31(17m)(e)3.c. c. At least 6 inches above insulation materials (See Note).

SPS 382.31(17m)(e)3.d. d. In an accessible area.

SPS 382.31(17m)(e)3.e. e. Within a space that allows air to enter the product and has an opening equivalent to requirements in sub. (14).

SPS 382.31(17m)(e)3.f. f. With at least one 3-inch or larger diameter vent, serving the same building drain on which the AAV is installed, which extends to the atmosphere outside of the building.

SPS 382.31 Note Note: The distance is measured from termination of the vent pipe to the point specified in the rule.

SPS 382.31(17m)(f) (f) AAVs shall be tested. The AAV shall be tested prior to or after installation. The AAV shall be subjected to a pressure equal to 1 inch of water column. After observing for 1 minute, if the pressure falls .5 of an inch or less, it will be considered a passing AAV.

SPS 382.31(17m)(g) (g) When an AAV is installed in a building, the contractor shall provide the owner with a copy of the manufacturer’s written AAV description.

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; CR 23-006: r. and recr. (11) (a), (16) (d), (e), am. (17) (intro.), cr. (17) (d), (17m) Register September 2023 No. 813, eff. 10-1-23; correction in (16) (h), made under 13.92 (4) (b) 7., Stats., and correction in (16) (e), (17m) (e) 3. e., f., (f) made under s. 35.17, Stats., Register September 2023 No. 813.

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 Note Note: Residential exclusion see s. SPS 325.01 (4) (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 or ASSE 1044.

SPS 382.32 Note Note: A list of referenced standards is contained in ch. SPS 381.

SPS 382.32(3)(c)3. 3. Barrier type trap seal protectors for floor drains shall conform to ASSE 1072.

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.

SPS 382.32(3)(e)1. 1. Except as provided in subd. 2., traps shall be of diameters not less than those specified in Table 382.30-1.

SPS 382.32(3)(e)2. 2. The minimum trap diameter for a trap serving a shower replacing a non-public residential-type bathtub is 1.5 inches provided each of the following apply:

SPS 382.32(3)(e)2.a. a. The shower shall have no more than one control valve and not allow for the operation of more than one showerhead simultaneously.

SPS 382.32(3)(e)2.b. b. It shall be permissible under this approval to use a diverter valve that feeds up to 2 showerheads provided the showerheads cannot be used simultaneously.

SPS 382.32(3)(e)2.c. c. The showerhead shall have a maximum flow rate of 2.5 gallons per minute.

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;

SPS 382.32(3)(f)4. 4. Separate fixture traps which depend on interior partitions for the trap seal;

SPS 382.32(3)(f)5. 5. Traps which depend upon moving parts to maintain the trap seal; and

SPS 382.32(3)(f)6. 6. Traps which in case of defect would allow the passage of sewer air.

SPS 382.32(4) (4) Installation.

SPS 382.32(4)(a) (a) Setting of traps. All traps shall be rigidly supported and set true with respect to the water level and so located as to protect the water seals, and shall be protected from freezing and evaporation.

SPS 382.32(4)(b) (b) Distance from fixture drain outlets.