SPS 382.30(5)(a)2.
2. The minimum pitch of horizontal branch drains larger than 2
‶ in diameter shall be
1/
8"
per foot.
SPS 382.30(5)(b)1.1. The minimum pitch of building drains shall be in accordance with Table 382.30-3.
SPS 382.30(5)(b)2.a.a. The minimum pitch of building sewers 10" or less in diameter shall be in accordance with Table 382.30-3.
SPS 382.30(5)(b)2.b.
b. The minimum pitch of building sewers 12" or larger in diameter shall conform with the minimum pitch specified for municipal sewers in s.
NR 110.13.
SPS 382.30(5)(c)1.1. The minimum pitch of private interceptor main sewers 6" or less in diameter shall be in accordance with Table 382.30-3.
SPS 382.30(5)(c)2.
2. The minimum pitch of private interceptor main sewers 8" or larger in diameter shall conform with the minimum pitch specified for municipal sewers in s.
NR 110.13.
SPS 382.30 Note
Note: See ch.
SPS 382 Appendix for further explanatory material.
SPS 382.30(6)
(6)
Offsets in vertical drains. Offsets in vertical drain piping shall be in accordance with this subsection.
SPS 382.30(6)(a)1.1. An offset in a vertical drain, with a change in direction of 45
° or less from the vertical, shall be sized as a vertical drain piping in accordance with sub.
(4).
SPS 382.30(6)(a)2.
2. Except as provided in par.
(c), where a horizontal branch connects to a drain stack within 2 feet above or below an offset with a change of direction of 30
° to 45
° from the vertical and the offset is located 5 or more branch intervals below the top of the stack, the offset shall be vented in accordance with s.
SPS 382.31 (5) (a).
SPS 382.30(6)(b)
(b) Offsets of more than 45°. Except as provided in par.
(c), a drain stack with an offset of more than 45
° from the vertical shall be installed in accordance with subds.
1. to
5. SPS 382.30(6)(b)1.
1. That portion of the drain stack above the highest offset shall be sized as for vertical drain piping in accordance with sub.
(4).
SPS 382.30(6)(b)2.
2. That portion of the offset between and including the offset fittings shall be sized as building drain piping in accordance with sub.
(4).
SPS 382.30(6)(b)3.
3. That portion of stack below the offset shall be not less than the size of the offset.
SPS 382.30(6)(b)4.
4. Where an offset of more than 45
o is located more than four branch intervals below the top of the drain stack, a horizontal branch may not connect within the offset or within 2 feet above or below such offset.
SPS 382.30(6)(b)5.a.a. Except as exempted in subd.
5. b., or par.
(c), where an offset in a drain stack with a change of more than 45
° from vertical is located below 5 or more branch intervals, the offset shall be vented in accordance with s.
SPS 382.31 (5) (b).
SPS 382.30(6)(b)5.b.
b. The vent required in subd.
5. a. shall not be required where the drain stack, including the offset, is sized one pipe size larger than required for a building drain designed to serve as per sub.
(4) and the entire stack and offset are not less in cross sectional area than that required for a stack plus the area of a vent as required in s.
SPS 382.31 (5) (b).
SPS 382.30 Note
Note: See ch.
SPS 382 Appendix for further explanatory material.
SPS 382.30(6)(c)
(c) Exception. Where an offset is located two or more feet below the lowest branch drain connection to the stack, the venting specified in this subsection and s.
SPS 382.31 (5) (b) is not required.
SPS 382.30(7)
(7)
Horizontal branch drain connection at base of a stack. SPS 382.30(7)(a)(a) A horizontal branch drain may not connect downstream from the base fitting of a drain stack 2" or larger in diameter within the distance equal to 10 pipe diameters of the drain to which the horizontal branch drain connects.
SPS 382.30(7)(b)
(b) 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 382.30 Note
Note: See ch.
SPS 382 Appendix for further explanatory material.
SPS 382.30(8)
(8)
Piping changes in direction. Changes in the direction of drain piping shall be accomplished in accordance with the requirements of this subsection.
SPS 382.30(8)(a)
(a) Fittings. All changes in direction of flow in drain piping shall be made by the appropriate use of 45 degree wyes, long or short sweep quarter bends, sixth, eighth, or sixteenth bends, or by a combination of these or other equivalent fittings. Except as provided in subds.
1. to
3., fittings which change the direction of flow for drain piping 8
‶ or less in diameter shall conform to the minimum radii specified in Table 382.30-4.
SPS 382.30 Note
Note: See ch.
SPS 382 Appendix for further explanatory material.
SPS 382.30(8)(a)1.
1. The minimum radius for the first 90
° fitting downstream from a trap serving a lavatory or sink shall be 1-3/4" for drain piping 1-1/2" in diameter. The fitting shall be a tee or quarter bend.
SPS 382.30(8)(a)2.
2. The minimum radius for the first 90
° bend or elbow downstream from a water closet shall be 2-1/2" for drain piping 3" in diameter.
SPS 382.30(8)(b)
(b) Blowout type fixtures. Where blowout type fixtures are installed back to back, appropriate fittings shall be installed to prevent the passage of wastes from one fixture to the other.
SPS 382.30(9)
(9)
Drain fittings and connections. Drain fittings, connections, devices and methods of installation shall not obstruct or retard the flow of water, wastes, sewage or air in the drain system or venting system in an amount greater than the normal frictional resistance to flow, unless as otherwise permitted in this chapter or unless approved by the department.
SPS 382.30(9)(a)
(a) Closet bend. The reduction of a 4 x 3 inch closet bend or collar fitting from 4" to 3" shall not be considered an obstruction.
SPS 382.30(9)(b)
(b) Side inlet tees or bends. The side inlet of a low pattern or high pattern tee or bend shall not be used as a vent connection when the side inlet is placed in a horizontal position or when any arrangement of piping or fittings produces a similar effect.
SPS 382.30(9)(c)
(c) Prohibited fittings and connections. The types of fittings and connections specified in subds.
1. to
4. shall not be used for drain piping:
SPS 382.30(9)(c)1.
1. A heel inlet bend when the heel inlet is in the horizontal position;
SPS 382.30(9)(c)2.
2. A fitting or connection which has an enlargement chamber or recess with a ledge or shoulder, or reduction in pipe area in the direction of flow;
SPS 382.30(9)(c)4.
4. A connection by means of drilling and tapping of a drain or vent pipe, unless as otherwise approved by the department.
SPS 382.30(10)(a)1.1. `General.' All sanitary building subdrains shall discharge into an approved, vented sump with an airtight cover. The sump shall be so located as to receive the wastewater by gravity flow, and shall be located at least 25 feet from any water well or as otherwise approved by the department of natural resources.
SPS 382.30(10)(a)2.
2. `Capacity.' Except as provided in pars.
(c) and
(d), the minimum capacity of the sump shall be determined in accordance with the provisions of subd.
2. a. to
e. Capacity shall be based on one pump only.
SPS 382.30(10)(a)2.a.
a. The water supply fixture unit method shall be used to determine peak input flow in gallons per minute; only the fixtures that drain to the sump shall be included.
SPS 382.30 Note
Note: When converting water fixture units to gallons per minute it is permissible to calculate the load as a supply system with predominantly flush tanks.
SPS 382.30(10)(a)2.b.
b. The capacity of the sump shall be such that the pump when actuated by the lowest “pump on" switch runs at least 20 seconds.
SPS 382.30(10)(a)2.c.
c. Between the highest “pump on" switch level and the sump inlet, the sump shall hold the amount of input that exceeds the discharge of the pumping equipment in a 5 minute peak input period. In no case shall the vertical distance between the switch and the inlet be less than 3 inches.
SPS 382.30(10)(a)2.d.
d. The low water level shall be maintained in accordance with the pump manufacturer's requirements, but shall not be less than 4
‶ above the sump bottom.
SPS 382.30(10)(a)2.e.
e. Sumps containing one pump shall have an inside diameter of at least 24". Sumps containing 2 pumps shall have an inside diameter of at least 30
‶.
SPS 382.30 Note
Note: See ch.
SPS 382 Appendix for further explanatory material.
SPS 382.30(10)(a)4.
4. `Materials.' All sumps shall be constructed in a watertight manner of approved materials in accordance with ch.
SPS 384.
SPS 382.30(10)(a)5.
5. `Removable covers.' Penetrations through the top of removable sump covers shall be limited to those for the electrical supply, the vent piping and the discharge piping for the pump or pumps.
SPS 382.30(10)(b)1.1. `Where required.' The liquid from all sanitary building sumps shall be lifted and discharged into the building sanitary drain system by automatic ejectors, pumps or any other equally efficient method approved by the department.
SPS 382.30(10)(b)2.a.a. Duplex ejector or pumping equipment shall be installed in a public building where 3 or more water closets or more than 20 drainage fixture units discharge into a sump.
SPS 382.30(10)(b)2.b.
b. Duplex ejector or pumping equipment shall be installed where the sanitary wastes of 2 or more one- or 2-family dwellings discharge into a sump.
SPS 382.30(10)(b)2.c.
c. Where duplex ejector or pumping equipment is installed, appropriate devices shall be installed to automatically alternate operation of the pumps or ejectors and to operate both pumps or ejectors when one unit cannot handle the load.
SPS 382.30(10)(b)2.d.
d. Where duplex pumping equipment is installed, an audible or visual alarm system with a manual control reset shall be installed to indicate pump failure.
SPS 382.30(10)(b)3.
3. `Size.' The size and design of an ejector or pump shall be determined by the capacity of the sump to be served, the discharge head and discharge frequency. All ejectors and pumps shall provide a minimum flow velocity of 2 feet per second in the forced discharge piping.
SPS 382.30 Note
Note: See ch.
SPS 382 Appendix for velocity in relation to flow rate by various pipe sizes.
SPS 382.30 Note
Note: Ejectors or pumps discharging to septic tanks may disturb the normal settling properties of the tank environment; contact the Division of Industry Services for more information.
SPS 382.30(10)(b)3.a.
a. All sewage grinder pumps shall have a minimum 1
1/
4" diameter discharge opening and discharge piping.
SPS 382.30(10)(b)3.b.
b. All nongrinder-type sewage pumps serving water closets shall be capable of passing a 2" diameter solid ball and shall have a minimum 2
‶ diameter discharge opening and discharge piping. All other pumps handling sanitary wastes shall be rated by the manufacturer as an effluent pump, shall be capable of passing a
1/
2‶ diameter solid ball and shall have a minimum 1
1/
4" diameter discharge opening and discharge piping.
SPS 382.30(10)(b)4.a.a. The discharge pipe from the ejector or pump shall be connected to the gravity drain by means of a wye pattern fitting. Where the fitting connects to a horizontal drain, the bottom of the wye branch of the fitting shall be located above the horizontal center line.
SPS 382.30(10)(b)4.b.
b. With the exception of exterior sumps, a full flow check valve shall be installed in the discharge piping from each ejector or pump.
SPS 382.30(10)(b)4.c.
c. Where duplicate ejector or pumping equipment is installed, each discharge pipe from an ejector or pump shall be provided with a gate or ball type valve installed downstream of each full flow check valve.
SPS 382.30(10)(b)5.
5. `Discharge pipe air relief.' Air relief valves shall be provided at all high points in the discharge piping of an ejector or pump where the piping arrangement creates an air trap.
SPS 382.30(10)(b)6.
6. `Prohibited connections.' No fixtures may be connected to the discharge pipe between the ejector or pump and the point where it enters the gravity drain.
SPS 382.30(10)(b)7.
7. `Maintenance.' All ejectors, pumps and like appliances shall receive care as needed to keep them in a satisfactory operating condition.
SPS 382.30(10)(c)
(c) Prefabricated pump and sump systems. Macerating toilet systems and waste pumping systems for plumbing fixtures shall conform to ASME A112.3.4-2018/CSA B45.9-18. If unspecified by the manufacturer, the minimum capacity of a pump and sump system shall be determined in accordance with all of the following:
SPS 382.30(10)(c)1.
1. The water supply fixture unit, wsfu, method shall be used to determine peak input flow in gallons per minute. The peak input shall include all the fixtures that drain to the sump.
SPS 382.30(10)(c)2.
2. Unless storage is provided as specified in par.
(a) 2., the capacity of the prefabricated pump and sump system shall accommodate the peak input flow.
SPS 382.30(10)(c)3.
3. The low water level shall be maintained in accordance with the pump manufacturer's requirements.
SPS 382.30(10)(d)
(d) Exterior sumps. Exterior sumps shall comply with s.
SPS 384.25. The minimum capacity of exterior sumps shall be determined in accordance with all of the following:
SPS 382.30(10)(d)1.
1. Peak input flow in gallons per minute shall be determined in accordance with either of the following:
SPS 382.30(10)(d)1.a.
a. The water supply fixture unit, wsfu, method of all the fixtures that drain to the sump.
SPS 382.30(10)(d)2.
2. In lieu of providing the duplex pumping equipment as specified in par.
(b) 2., a one-day holding capacity may be provided above a high level alarm when installed on a simplex system.
SPS 382.30(11)(a)
(a) Limitations. No building sewer may pass through or under a building to serve another building, unless:
