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.
SPS 382.33(9)(c)1.1. `Residential types.' Residential-type clothes washers shall discharge into the sanitary drain system by means of an air-break.
SPS 382.33(9)(c)1.a.
a. A standpipe receptor may not extend more than 36 inches nor less than 18 inches above the centerline of the trap outlet.
SPS 382.33(9)(c)1.b.
b. A standpipe receptor shall terminate at least 26 inches but not more than 48 inches above the floor on which the clothes washer is located.
SPS 382.33(9)(c)1.c.
c. The maximum number of washers which may discharge to a trap shall be in accordance with Table 382.33-2.
SPS 382.33(9)(c)1.d.
d. Washer wastes shall not be discharged to gutters, troughs, local waste piping, indirect waste manifolds or other similar connections.
SPS 382.33(9)(c)2.
2. `Laundries.' Pumped-discharge automatic clothes washing equipment, including residential-type clothes washers, in launderettes, laundromats, and self-service laundry establishments shall have the wastes discharge to a drain system by means of standpipes. The standpipes shall be installed in accordance with subd.
1. SPS 382.33(9)(c)3.
3. `Commercial-type.' Gravity discharge clothes washing equipment shall discharge by means of an air-break or by other approved methods into a floor receptor, trench, or trough.
SPS 382.33(9)(c)3.a.
a. The receptor shall be sized to hold one full simultaneous discharge load from every machine draining into the receptor.
SPS 382.33(9)(c)3.b.
b. The size of the receptor drain shall be determined by the manufacturer's discharge flow rate and the frequency of discharge.
SPS 382.33 Note
Note: See ch.
SPS 382 Appendix for further explanatory information.
SPS 382.33(9)(d)
(d) Dishwashing machines. All dishwashing machines shall discharge to the sanitary drain system.
SPS 382.33(9)(d)1.
1. `Residential type.' The indirect waste piping from a residential-type dishwashing machine shall not exceed a developed length of 10 feet. The indirect waste piping from a residential-type dishwashing machine
shall be installed in accordance with one of the following methods:
SPS 382.33(9)(d)1.a.
a. Where an air-gap or air-break is located below the countertop, the indirect waste piping from the dishwashing machine shall discharge to a standpipe. The standpipe shall be at least 1
½
inches in diameter and shall extend at least 15 inches above the trap weir.
SPS 382.33(9)(d)1.b.
b. Where an air-gap or air-break is located above the countertop, the indirect waste piping from the dishwashing machine shall discharge to local waste piping. The local waste piping shall connect to the kitchen sink branch tailpiece above the trap inlet, the standpipe or to the dishwashing machine connection of a food waste grinder. When the local waste piping discharges to a standpipe, the standpipe shall be at least 1
½ inches in diameter and shall extend at least 15 inches above the trap weir. Where a hose is used for local waste piping, the developed length shall not exceed 18 inches.
SPS 382.33(9)(d)2.
2. `Commercial'. Commercial dishwashing machines shall discharge into a sanitary drain system by means of an air-gap or air-break into a trapped and vented receptor. The indirect waste piping may not be more than 30 inches in length.
SPS 382.33(9)(e)
(e) Drips and drain outlets. Appliances, devices and apparatus not defined as plumbing fixtures which have drip or drain outlets, which discharge to the plumbing system, shall discharge into an approved receptor by means of an approved air-gap or air-break.
SPS 382.33(9)(f)2.
2. Drains serving elevator pits shall not connect directly with the storm drain system by means of gravity flow piping.
SPS 382.33(9)(f)4.
4. A drain serving an elevator pit that discharges to a sump shall have a submerged inlet constructed to maintain a minimum 6
‶ trap seal.
SPS 382.33(9)(f)5.
5. A sump located in an elevator pit may only receive storm or clear water waste from the elevator pit or the elevator machine room, or both.
SPS 382.33 Note
Note: See ch.
SPS 382 Appendix for further explanatory material.
SPS 382.33(9)(fm)
(fm)
Elevator threshold drains. Elevator emergency threshold drains provided to meet the requirements of International Building Code s. 3007.3 or 3008.3, as adopted and modified by chs.
SPS 361 to
366, may be used only to minimize infiltration of water from fire sprinklers into elevator hoistways. Such drains may not receive other water including wastewater. Elevator threshold drains shall comply with all of the following:
SPS 382.33(9)(fm)1.
1. In lieu of individual traps, a single trap may serve multiple threshold drains on a single floor serving a single hoistway.
SPS 382.33(9)(fm)6.
6. The elevator threshold drain stack utilizing a combination drain and vent as permitted by s.
SPS 382.31 (17) (d) may not be combined with other plumbing prior to discharging to the building drain or other discharge points.
SPS 382.33(9)(fm)8.
8. The drain stack shall be sized to accommodate the anticipated design discharge loads of the automatic fire sprinkler system.
SPS 382.33(9)(g)
(g) Food handling establishments. Plumbing fixtures, devices, appliances, and appurtenances installed in food handling establishments engaged in the storage, preparation, selling, serving, or processing of food shall be installed in accordance with this paragraph.
SPS 382.33(9)(g)1.
1. `Bar and soda fountain sinks.' A bar sink, whether installed for hand washing or other use, or a soda fountain sink may discharge to the sanitary drain system through indirect waste piping.
SPS 382.33(9)(g)1.a.
a. Where the indirect waste piping is not trapped, the wastes shall be discharged by means of an air-gap.
SPS 382.33(9)(g)1.b.
b. Where the indirect waste piping is trapped, the wastes shall be discharged by means of an air-gap or air-break.
SPS 382.33(9)(g)2.
2. `Beer taps, coffee makers, glass fillers and soda dispensers.' The drip pan from a beer tap, coffee maker, glass filler, soda dispenser or similar equipment shall discharge to the sanitary drain system through indirect waste piping by means of an air-break or air-gap.
