Wisconsin Administrative Code › Department of Safety and Professional Services › SPS 301-399 - Safety, Buildings, and Environment › SPS 380-387 - Plumbing › Chapter SPS 382 - Design, Construction, Installation, Supervision, Maintenance And Inspection Of Plumbing › Subchapter III - Drain and Vent Systems › Section SPS 382.38 - Discharge points

Current through June 24, 2024
(1) PURPOSE. The purpose of this section is
					 to establish allowable discharge points for wastewater discharging from
					 plumbing systems.
(2) SCOPE. The
					 provisions of this section set forth the requirements for the discharge points
					 for wastewater based on the use of the fixtures, appurtenances, appliances and
					 devices discharging into the plumbing system.
(3) GENERAL REQUIREMENTS.
(a) Wastewater from plumbing systems shall be
					 discharged as specified in Table 382.38-1.
(b) Wastewater from uses other than those
					 listed in Table 382.38-1, shall be discharged as specified by the department on
					 a site-specific basis.
Table 382.38 - 1
Allowable Discharge Points by Fixture or Specific
						Uses
Use or
									 Fixture
Allowable Discharge
									 Points
POWTSa
Municipal Sanitary
									 Sewer
Municipal Storm
									 Sewer
Ground
									 Surface
Combined Sanitary-Storm
									 Sewer
Subsurface Dispersal 
									 i
1. Cross connection control device or assembly
									 [see s.
									 SPS
									 382.33 (9) (i)]
X
X
X 
									 b, c,e
X
2. Domestic wastewater
X
X
X
3. Condensate from high efficiency furnace or
									 water heater
X
X
X
4. Drinking fountain
X
X
X
X 
									 b
X
X
4m. Elevator threshold
									 drains
X
X
X
5. Elevator pit drain [see s.
									 SPS
									 382.33 (9) (f)]
X
X 
									 b
X
X
6. Enclosed public parking
									 levels
X
X
X 
									 b
X
X
7. Industrial wastewater 
									 h
Xf
X
X
8. Municipal well pump house floor drain and
									 sink
X
X
X 
									 b
X
X
9. One- and 2-family garage floor area [see s.
									 SPS
									 382.34 (4) (b)]
X
X
X 
									 b
X
9g. Garage catch basins or oil interceptors in
									 public buildings and facilities. [see s.
									 SPS
									 382.34 (4) (a) 1. a.]
Xc, h,
										k
X
9r. Open public parking
									 levels
X
X 
									 b
X
X
10. Residential living unit air conditioner
									 condensate
X
X 
									 g
X 
									 c
X 
									 b
X
X
11. Storm water, groundwater, fire sprinkler
									 test discharge and clear water
X
X 
									 g
X 
									 c
X 
									 b
X
X
12. Secondary roof drain
									 systems
X 
									 j
13. Swimming pool or wading pool * diatomaceous
									 earth filter backwash
X
X
X
14. Swimming pool or wading pool * drain
									 wastewater
X
X 
									 b
X 
									 b,c
X 
									 b,c
X 
									 b
X
15. Swimming pool or wading pool * sand filter
									 backwash
X
X 
									 b
X 
									 b,c
X 
									 b,c
X 
									 b
X
16. Water heater temperature and pressure
									 relief valve [see s.
									 SPS
									 382.40 (5)]
X
X
X
X 
									 b
X
X
17. Wastewater from water treatment
									 device
X
X
X 
									 c
X 
									 b,c
X
X
18. Whirlpool backwash drain and
									 wastewater
X
X
X 
									 c
X 
									 b,c
X
19. Discharges not specifically listed
									 above
Contact the department
a Allowed when the POWTS is
						designed to include designated wastewater.
b Unless prohibited by local
						municipality and when no nuisance is created.
c A discharge permit may be
						required by the department of natural resources.
e Allowed for exterior
						installation and when no sanitary sewer is in the building.
f Refer to the department of
						natural resources for discharge regulations.
g Fifty gallons per day. h The
						department of natural resources may require WPDES permits for industrial
						discharges and may allow other options.
i Subsurface dispersal must
						comply with s.
						SPS
						382.365.
j Discharge separate from the
						primary system and where observable.
k Discharge is required to be
						received by a holding tank, see s.
						SPS
						382.34 (4) for additional
						requirements for garage floor area wastewater.