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)4.
4. Separate fixture traps which depend on interior partitions for the trap seal;
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)1.1. `Vertical distance.' Except as provided in subd.
1. a. to
c., the vertical distance between the top of the fixture drain outlet and the horizontal center line of the trap outlet shall not exceed 15".
SPS 382.32(4)(b)1.a.
a. The vertical distance between the top of the strainer of a floor drain or the opening of a standpipe receptor and the horizontal center line of the trap outlet shall not exceed 36".
SPS 382.32(4)(b)1.b.
b. The vertical distance between the top of the fixture drain outlet of a pedestal fixture or a cuspidor and the horizontal center line of the trap outlet shall not exceed 60".
SPS 382.32(4)(b)1.c.
c. The vertical distance between the water level in the bowl of a floor outlet water closet or floor outlet clinic sink and the center line of the horizontal portion of the fixture drain may not exceed 36 inches.
SPS 382.32(4)(b)1.d.
d. The vertical distance from the inlet to the horizontal centerline of the fixture drain for a campsite receptor, exterior storm drain inlet, or a receptor for a sanitary dump station may exceed 3 feet so as to permit the trap to be installed below the predicted depth of frost.
SPS 382.32(4)(b)1.e.
e. The vertical distance of a floor outlet fixture between the top of the fixture drain outlet and the horizontal center line of the trap outlet may not exceed 18 inches.
SPS 382.32(4)(b)2.
2. `Horizontal distance.' Except as provided in subd.
2. a. and
b., the horizontal distance between the vertical centerline of a fixture drain outlet and the vertical centerline of the trap inlet shall not exceed 15".
SPS 382.32(4)(b)2.a.
a. The horizontal distance for a pedestal drinking fountain shall not exceed 24".
SPS 382.32(4)(b)2.b.
b. The horizontal distance for an exterior sanitary area drain or a residential garage floor drain discharging through an interior trap shall not exceed 25 feet.
SPS 382.32(4)(b)2.c.
c. The minimum horizontal distance between the vertical centerline of the outlet from a floor-mounted water closet and a 3-inch double tee shall be 30 inches.
SPS 382.32 Note
Note: See ch.
SPS 382 Appendix for further explanatory material.
SPS 382.32(5)
(5)
Direct fixture drain connection. Except as provided in s.
SPS 382.33, all plumbing fixtures and appliances discharging wastes shall connect directly to a drain system.
SPS 382.32(5)(a)1.1. Floor drains shall be so located as to be accessible for cleaning purposes.
SPS 382.32(5)(a)2.
2. A floor drain receiving the wash from garbage cans shall be at least 3" in diameter.
SPS 382.32(5)(b)
(b) Kitchen sinks. Horizontal drain piping serving a kitchen sink trap shall not connect to vertical drain piping by means of a double sanitary tee where an appliance with pump discharge or a food waste grinder are installed.
SPS 382.32(5)(c)
(c) Water closets. A water closet shall discharge through a drain pipe or fitting with a minimum diameter of 3".
SPS 382.32(5)(c)1.
1. A floor mounted wall outlet water closet shall connect to a 4 inch or 4
× 3 inch closet collar fitting or to a horizontal or vertical carrier type fitting.
SPS 382.32(5)(c)2.
2. A floor outlet water closet shall connect to a 4 inch or 4
× 3 inch closet collar fitting.
SPS 382.32(5)(c)3.
3. A wall mounted wall outlet water closet shall connect to a horizontal or vertical carrier type fitting.
SPS 382.32(5)(c)4.
4. Two water closets discharging to a vertical drain from opposite sides by means of the same fitting shall be installed in accordance with subd.
4. a. and
b. SPS 382.32(5)(c)4.a.
a. Where the vertical drain is 3" in diameter, the fitting for floor outlet water closets shall be a 3 inch double wye pattern fitting.
SPS 382.32(5)(c)4.b.
b. Where the water closets are wall outlet types the fitting shall be a double wye pattern fitting or a carrier-type fitting.
SPS 382.32(5)(d)
(d) Blowout-type fixtures. Blowout-type plumbing fixtures shall be installed in accordance with the approval of the department.
SPS 382.32 History
History: Cr.
Register, February, 1985, No. 350, eff. 3-1-85; am. (4) (a), cr. (5) (intro.) and (d),
Register, May, 1988, No. 389, eff. 6-1-88; am. (4) (b) 1. b.,
Register, April, 2000, No. 532, eff. 7-1-00;
CR 02-002: r. and recr. (3) (c) 1. and (4) (b) 2., am. (4) (b) 1. b., cr. (4) (b) 1. d.,
Register April 2003 No. 568, eff. 5-1-03;
CR 02-129: am. (3) (intro.)
Register January 2004 No. 577, eff. 2-1-04;
CR 04-035: am. (3) (a) 3.
Register November 2004 No. 587, eff. 12-1-04;
CR 08-055: cr. (4) (b) 2. c.
Register February 2009 No. 638, eff. 3-1-09; correction in (2), (3) (a) 3., (e), (5) (intro.) made under s.
13.92 (4) (b) 7., Stats.,
Register December 2011 No. 672;
CR 23-006: am. (3) (c) 2., cr. (3) (c) 3., renum. (3) (e) to (3) (e) 1. and am., cr. (3) (e) 2., am. (4) (b) 1., c., cr. (4) (b) 1. e., am. (5) (b), (c) 2. Register September 2023 No. 813, eff. 10-1-23.
SPS 382.33
SPS 382.33 Indirect and local waste piping. SPS 382.33(1)(a)(a) The provisions of this section set forth the requirements for the installation of indirect waste piping and local waste piping.
SPS 382.33(1)(b)
(b) Indirect waste piping and local waste piping draining the fixtures, appliances and devices having a public health concern, including but not limited to those listed in Table 382.33-1, shall be considered as plumbing and shall comply with the provisions of this section.
SPS 382.33(2)
(2)
Materials. Indirect waste piping more than 30" in length and all local waste piping shall be of approved materials in accordance with ch.
SPS 384.
SPS 382.33(3)
(3)
Size. Except as provided in pars.
(a) and
(b), indirect waste piping more than 30" in length and all local waste piping shall be sized in accordance with s.
SPS 382.30.
SPS 382.33(3)(a)
(a) Indirect or local waste piping not exceeding 20 feet in length for refrigerated food display cases may not be less than one inch in diameter.
SPS 382.33(3)(b)
(b) Indirect waste piping, attached to an appliance, appurtenance or equipment through which pressurized waste is discharged, shall be sized in accordance with specifications of the manufacturer of the appliance, appurtenance or equipment.
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See PDF for table 
SPS 382.33(4)
(4)
Installation. Indirect waste piping and local waste piping shall be so installed as to permit access for flushing and cleaning.
SPS 382.33(5)(a)1.1. Gravity flow indirect waste piping more than 30" in length shall be provided with a trap in accordance with s.
SPS 382.32 (4), except indirect waste piping draining a sterilizer shall not be trapped.
SPS 382.33(5)(a)2.
2. All indirect waste piping draining a refrigerated food storage room, compartment or display case shall be provided with a trap in accordance with s.
SPS 382.32 (4).
SPS 382.33(5)(b)
(b) Local waste piping. Local waste piping handling sanitary wastes and more than 30" in length shall be provided with a trap in accordance with s.
SPS 382.32 (4).
SPS 382.33(6)
(6)
Maximum length. Indirect waste piping and local waste piping handling sanitary wastes may not exceed 30 feet in length horizontally nor 15 feet in length vertically.
SPS 382.33 Note
Note: See ch.
SPS 382 Appendix for further explanatory material.
SPS 382.33(7)
(7)
Air-gaps and air-breaks. All indirect waste piping and all local waste piping shall discharge by means of an air-gap or air-break into a receptor.
SPS 382.33(7)(a)
(a) Air-gap installation. The installation of an air gap shall conform to any of the following requirements:
SPS 382.33(7)(a)1.a.
a. The distance of an air gap serving indirect waste piping one inch or less in diameter and a receptor shall be at least twice the diameter of the indirect waste piping.
SPS 382.33(7)(a)1.b.
b. The distance of an air gap between indirect waste piping larger than one inch in diameter and a receptor shall not be less than 2 inches.
SPS 382.33(7)(a)2.
2. The installation of all air-gap fittings shall comply with ASME A112.1.3.
SPS 382.33(7)(a)3.
3. The installation of a residential dishwashing machine manufactured air gap shall comply with ASSE 1021.
SPS 382.33(7)(b)
(b)
Air–break installation. The air-break between indirect waste piping or local waste piping and the receptor shall be accomplished by extending the indirect waste piping or local waste piping below the flood level rim of the receptor and terminating at an elevation above the trap outlet.
SPS 382.33 Note
Note: See ch.
SPS 382 Appendix for further explanatory material.
SPS 382.33(8)
(8)
Receptors. A receptor receiving the discharge from indirect waste piping or local waste piping shall be of a shape and capacity as to prevent splashing or flooding. Receptors shall be installed in accordance with this subsection and shall be accessible.
SPS 382.33(8)(a)
(a) Waste sinks and standpipes. A waste sink or a standpipe serving as a receptor shall have its rim at least one inch above the floor.
SPS 382.33(8)(b)
(b) Floor sinks. A floor sink serving as a receptor shall be equipped with a removable metal basket over which the indirect waste piping or local waste piping is to discharge, or the floor sink shall be equipped with a dome strainer. Indirect waste piping or local waste piping shall not discharge through a traffic grate, but shall terminate over an ungrated portion of the floor sink.
SPS 382.33(8)(c)
(c) Local waste piping. Local waste piping may not receive discharge from another local waste pipe.
SPS 382.33(8)(d)
(d) Other receptors. A plumbing fixture may not be used as a receptor for indirect or local waste piping, except as provided in subds.
1. to
9. SPS 382.33(8)(d)1.
1. The indirect waste piping of a portable dishwasher or water treatment device serving one or 2 outlets may discharge into a kitchen sink of a dwelling unit or to a branch tail piece serving a kitchen sink.
SPS 382.33(8)(d)2.
2. The indirect waste piping of a residential-type automatic clothes washer or water treatment device may discharge into a laundry tray.
SPS 382.33(8)(d)3.
3. The indirect or local waste piping serving a cross connection control device or assembly, water treatment device, air conditioner, humidifier or furnace condensate may discharge into a branch tailpiece serving a laundry tray.
SPS 382.33(8)(d)4.
4. The local waste piping serving a water heater temperature and pressure relief valve, water treatment device, cross connection control device or assembly, humidifier, sterilizer, or a furnace or air conditioner may discharge into the riser of a floor drain when installed in accordance with sub.
(7) (b).
SPS 382.33(8)(d)5.
5. The indirect or local waste piping serving a water heater temperature and pressure relief valve, water treatment device, cross connection control device or assembly, or a furnace or air conditioner may discharge to a floor served by a floor drain so as not to create a health or safety hazard.
SPS 382.33(8)(d)6.
6. The indirect or local waste piping in a one- or 2-family dwelling serving a water heater temperature and pressure relief valve or water treatment device may discharge through the cover of a clear water sump so as not to adversely affect floats by means of a fixed air gap installed in accordance with subs.
(7) (a) 2. and
(8).
SPS 382.33(8)(d)7.
7. The indirect waste piping serving a dental mold grinder may discharge into the tailpiece of a trap serving a sink that is provided with a plaster trap and is installed within 3 feet of the mold grinder.
SPS 382.33(8)(d)8.
8. A water closet, clinic sink, or urinal may receive the discharge from a mortuary or autopsy table.
SPS 382.33(8)(d)9.
9. The indirect waste piping serving a dialysis machine may discharge to a water closet or lavatory under all the following conditions:
SPS 382.33(8)(d)9.a.
a. The water closet or lavatory is in a patient toilet room of a single occupancy in a healthcare facility.
SPS 382.33(8)(d)9.b.
b. The discharge to the plumbing fixture shall be made by either a temporary or permanent fixed 1-inch air-gap that will not impede normal operation of the fixture when not in dialysis mode.
SPS 382.33(8)(d)9.c.
c. The discharge to the fixtures shall be limited to a department-approved portable healthcare dialysis appliance and a portable water treatment device specifically for dialysis use.
SPS 382.33 Note
Note: See ch.
SPS 382 Appendix A-382.33 (8) (a) to (d) for further explanatory material.
SPS 382.33(9)
(9)
Indirect waste piping required. Indirect waste shall discharge to an approved receptor in accordance with all of the following:
SPS 382.33(9)(a)
(a) Boilers, pressure tanks and relief valves. Boilers, pressure tanks, relief valves and similar equipment discharging to a drain system shall be by means of an air-gap.
SPS 382.33(9)(a)1.
1. Steam pipes shall not connect or discharge to any part of a plumbing system.
SPS 382.33(9)(a)2.a.a. Except as provided in subd.
2. b., wastewater more than 160
° F in temperature shall be discharged by means of indirect waste to the plumbing system.
SPS 382.33(9)(a)2.b.
b. Steam condensate blow down shall be cooled to 160
°F in temperature prior to discharging to a plumbing system.
SPS 382.33(9)(b)
(b) Clear water. When discharging to a plumbing system, all clear water shall discharge by means of an air-gap.
SPS 382.33(9)(bm)
(bm)
Clothes dryers. A single residential ventless dryer with a maximum discharge of less than 1 gallon per minute may discharge into a 2-inch automatic clothes washer box or standpipe within a dwelling unit. Both the residential automatic clothes washer drain hose and the residential ventless dryer drain hose shall physically fit within the receptor without distortion to either hose.
