SPS 382.30(3)(a)2.2. ‘Devices.’ Drainage fixture unit values for intermittent flow devices not listed in Table 382.30–1 shall be computed on the basis of one fixture unit equalling one gallon per minute of flow. SPS 382.30 NoteNote: Equipment with a timed discharge cycle(s) of 2 minutes or less may be considered as an intermittent flow device.
SPS 382.30(3)(b)(b) Continuous flow devices. Drainage fixtures unit values for continuous flow devices such as pumps, ejectors, air conditioning equipment or similar devices that discharge continuously shall be computed on the basis of 2 fixture units for each one gallon per minute of flow. SPS 382.30(4)(a)1.1. The total drainage load in any portion of drain piping may not exceed the limits specified in Tables 382.30-2 and 382.30-3, but may be less than the limits specified in Tables 382.30-2 and 382.30-3 based on an approved alternate standard consistent with s. SPS 381.20 (2) or an analysis provided by a Wisconsin registered architect, registered professional engineer, or permitted designer of engineering systems – plumbing. SPS 382.30(4)(a)2.2. The drainage fixture unit values assigned to a receptor may be less than the limits specified in Tables 382.30-2 and 382.30-3 based on an approved alternate standard consistent with s. SPS 381.20 (2) or an analysis provided by a Wisconsin registered architect, registered professional engineer, or permitted designer of engineering systems – plumbing. SPS 382.30 NoteNote: See s. SPS 382.31 (17) for sizing requirements of combination drain and vent systems. SPS 382.30(4)(b)1.1. ‘Gravity flow sewers.’ The minimum size of a gravity flow sanitary building sewer shall be 4″ in diameter. A municipality or sanitary district by ordinance may require that portion of the building sewer between the lot line and the public sewer to be larger than 4” in diameter. SPS 382.30(4)(b)2.a.a. Sewers pressurized through the use of sewage ejectors, sewage pumps or sewage grinder pumps shall be sized to maintain a minimum flow velocity of 2 feet per second and shall be in accordance with the ejector or pump manufacturer’s recommendations. SPS 382.30(4)(b)2.b.b. Pressurized building sewers shall be sized not less than 2” in diameter for sewage ejectors and sewage pumps, and 1¼” in diameter for all sewage grinder pumps. SPS 382.30(4)(c)1.1. Except as provided in subd. 3., the minimum size of a gravity flow private interceptor main sewer shall be 4” in diameter. SPS 382.30(4)(c)2.2. Except as provided in subd. 3., the minimum size of pressurized private interceptor main sewer shall be such so as to maintain a minimum flow velocity of 2 feet per second. SPS 382.30(4)(c)3.3. A municipality or a sanitary district may by ordinance, require the minimum size of a private interceptor main sewer to be larger than 4” in diameter. SPS 382.30(4)(c)4.4. Private interceptor main sewers 6” or less in diameter may not exceed the drainage fixture limits in Table 382.30-3. SPS 382.30(4)(c)5.5. Private interceptor main sewers 8” or larger in diameter shall conform with the design criteria specified in s. NR 110.13. SPS 382.30 NoteNote: See ch. SPS 382 Appendix A-382.30 (4) for further explanatory material. SPS 382.30(4)(d)(d) Future fixtures. Where provisions are made for the future installation of fixtures, the drainage fixture unit values of such fixtures shall be considered in determining the required sizes of drain and vent pipes. Construction to provide for future installations shall be terminated with a plugged fitting or fittings. SPS 382.30 NoteNote: For further explanatory material see ch. SPS 382 Appendix A-382.30 (4). SPS 382.30(5)(5) Pitch of horizontal drain piping. All horizontal drain piping 4” or larger in diameter shall be installed at a pitch which produces a computed velocity of at least 2 feet per second when flowing half full. SPS 382.30(5)(a)1.1. The minimum pitch of horizontal branch drains 2” or less in diameter shall be 1/4” per foot. 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(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 45o 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(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(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(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)(a)3.3. The minimum radius for the first 90° bend or elbow downstream from a water closet shall be 3” for drain piping 4” 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)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 NoteNote: 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(10)(a)4.4. ‘Materials.’ All sumps shall be constructed in a watertight manner of approved materials in accordance with ch. SPS 384.
/code/admin_code/sps/safety_and_buildings_and_environment/380_387/382
true
administrativecode
/code/admin_code/sps/safety_and_buildings_and_environment/380_387/382/iii/30/5/a/1
Department of Safety and Professional Services (SPS)
Chs. SPS 301-399 ; Safety, Buildings, and Environment
administrativecode/SPS 382.30(5)(a)1.
administrativecode/SPS 382.30(5)(a)1.
section
true
