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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 11/4" diameter discharge opening and discharge piping.
SPS 382.30(10)(b)4. 4. `Discharge connections.'
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 pumps and sump systems. The minimum capacity of a prefabricated 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. 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)1.b. b. The provisions as specified in s. SPS 383.43 (2) through (6).
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) (11)Building drains and building sewers.
SPS 382.30(11)(a)(a) Limitations. No building sewer may pass through or under a building to serve another building, unless:
SPS 382.30(11)(a)1. 1. The building sewer serves farm buildings or farm houses, or both, which are all located on one property; or
SPS 382.30(11)(a)2. 2. The building sewer or private interceptor main sewer serves buildings located on the same property and a document, which indicates the piping and distribution arrangement for the property and buildings, shall be recorded with the register of deeds no later than 90 days after installation.
SPS 382.30(11)(b) (b) Building drains.
SPS 382.30(11)(b)1.1. `Elevation.'
SPS 382.30(11)(b)1.a.a. All building drains shall be installed below the lowest floor levels on which fixtures may be installed if the public sewer, POWTs or private interceptor main sewer elevation permits.
SPS 382.30(11)(b)1.b. b. Where any portion of an above-ground building drain discharges to a vertical pipe, the building drain shall connect to the building sewer at an elevation at least 30" above the basement floor.
SPS 382.30 Note Note: See ch. SPS 382 Appendix for further explanatory material.
SPS 382.30(11)(b)2. 2. `Backwater protection.' A building drain subject to backflow or backwater shall be protected with a backwater valve or with a sump with pumping equipment in accordance with sub. (10).
SPS 382.30(11)(b)2.a. a. Backwater valves, when fully open, shall have a capacity not less than that of the pipes in which installed.
SPS 382.30(11)(b)2.b. b. Backwater valves shall be so located as to be readily accessible for cleaning.
SPS 382.30(11)(b)3. 3. `Floor drain required.'
SPS 382.30(11)(b)3.a.a. Where a plumbing fixture or appliance is located on a floor which is entirely below grade, a floor drain shall be installed to serve that floor.
SPS 382.30(11)(b)3.b. b. In any room containing the recessed or concealed portions of sterilizers located in health care or related facilities, at least one floor drain connecting to the drainage system shall be installed in a manner to adequately drain the entire floor area.
SPS 382.30(11)(c) (c) Building sewers.
SPS 382.30(11)(c)1.1. `Minimum depth.'
SPS 382.30(11)(c)1.a.a. The top of a building sewer shall be located at a depth of not less than 42 below finished grade, except as provided in subd. 1. b. or subd. 2.
SPS 382.30(11)(c)1.b. b. The top of a building sewer which discharges to a septic tank, holding tank or grease interceptor shall be located at a depth of not less than 18" below finished grade.
SPS 382.30(11)(c)2. 2. `Protection from frost.'
SPS 382.30(11)(c)2.a.a. Except as provided in subd. 2. c. to e., a building sewer or private interceptor main sewer shall be protected from frost in accordance with subd. 3. in areas where the top of the building sewer or private interceptor main sewer is located less than 60" below a surface area from which snow will be cleared.
SPS 382.30(11)(c)2.b. b. Except as provided in subd. 2. c. to e., a building sewer or private interceptor main sewer shall be protected from frost in accordance with subd. 3. in areas where the top of the building sewer or private interceptor main sewer is located less than 42" below a surface area which snow will not be cleared.
SPS 382.30(11)(c)2.c. c. Where a building sewer or private interceptor main sewer discharges to a holding tank, POWTs treatment tank or grease interceptor, the portion of a building sewer or private interceptor main sewer which is within 30 feet from the connecting building drain and which is under a surface area from which snow will not be cleared shall not be required to be protected from frost.
SPS 382.30(11)(c)2.d. d. Frost protection for a building sewer shall not be required where the predicted depth of frost as determined from Figure 382.30-1 and Table 382.30-6 does not extend below the top of the building sewer.
SPS 382.30(11)(c)2.e. e. Where a building sewer or private interceptor main sewer is installed to serve summer use public facilities, frost protection requirements shall not apply.
SPS 382.30 Note Note: This exemption applies to frost sleeves as provided in s. SPS 382.35 (5) (a) 2.
SPS 382.30(11)(c)3. 3. `Insulation for building sewers.' Where required by subd. 2. a. or b., building sewer or private interceptor main sewer insulation for frost protection shall be provided in accordance with one of the methods specified in subd. 3. a. to d.
SPS 382.30(11)(c)3.a. a. Extruded polystyrene foam insulation shall be installed at a depth of at least 18" below finished grade and at least 6" above the top of the sewer pipe. The minimum thickness and width of the foam insulation shall be determined from Figure 382.30-1 and Tables 382.30-5 to 382.30-7. If the insulation is to be installed more than 6" above the top of the sewer, the number of inches exceeding 6" shall be added to the width of insulation determined from Table 382.30-7.
SPS 382.30(11)(c)3.b. b. Extruded polystyrene foam insulation shall be installed using a box method. The 3-sided box shall be formed with 3 lengths of polystyrene foam insulation where the top of the box extends horizontally to the farthest edge of both vertical sides. The insulation shall be installed at or below a depth of at least 12" below finished grade and 6" above the top and 6" from each side of the building sewer or private interceptor main sewer. The minimum thickness of the foam insulation shall be determined from Figure 382.30-1 and Table 382.30-5.
SPS 382.30 Note Note: See ch. SPS 382 Appendix for further explanatory material.
SPS 382.30(11)(c)3.c. c. Lightweight insulating concrete shall be installed to the depth of the spring line of the sewer and shall extend laterally at least 6" on both sides of the sewer. The minimum thickness of the insulating concrete shall be determined from Figure 382.30-1 and Table 382.30-5. The thickness shall be measured from the top of the sewer. The top of the insulation shall be installed at least 12" below finished grade.
SPS 382.30(11)(c)3.d. d. Alternative methods of frost protection shall be approved by the department.
Figure 382.30-1. Frost protection zones.
SPS 382.30(11)(d) (d) Location limitations. Building drains, building sewers or private interceptor main sewers shall be separated from water wells by the applicable separation distances contained in chs. NR 811 and 812 or as otherwise approved by the department of natural resources.
SPS 382.30 Note Note: See s. SPS 382.40 for provisions regarding the separation of water supply piping, building sewers and private interceptor main sewers.
SPS 382.30 Note Note: See ch. SPS 382 Appendix for further explanatory material. Section NR 812.08 may require additional setbacks.
SPS 382.30(11)(e) (e) Installation of building drains and building sewers.
SPS 382.30(11)(e)1.1. `Trenching.' All excavations for building drains and building sewers shall be open trench work, unless otherwise permitted by local ordinance or accepted by the local inspector.
SPS 382.30(11)(e)2. 2. `Stable bottom.' Where the bottom of the trench can be maintained in a stable condition and free of water during the time of installation the building drain and the building sewer shall be bedded and initially backfilled to comply with all the following requirements:
SPS 382.30(11)(e)2.a. a. Where the trench bottom does not contain stone larger than one inch in size or where bedrock is not encountered, the trench may be excavated to grade.
SPS 382.30(11)(e)2.b. b. Where stone larger than one inch size or when bedrock is encountered, the trench shall be excavated to a depth at least 3 inches below the grade elevation and shall be brought back to grade with a bedding of sand, gravel or crushed stone that shall be of a size that all the material shall pass a ¾-inch sieve.
SPS 382.30(11)(e)2.c. c. Bedding shall be sufficiently dry and hand or mechanically compacted to a minimum of 90 percent standard proctor density.
SPS 382.30(11)(e)2.d. d. Initial backfill to a depth of 12 inches over the pipe shall be sand, crushed stone or excavated material which is neither corrosive nor organic in nature.
SPS 382.30(11)(e)2.e. e. Initial backfill shall be of a size that passes a one-inch sieve.
SPS 382.30(11)(e)2.f. f. A concrete floor may be placed over a building drain having less than 12 inches of initial backfill.
SPS 382.30(11)(e)2.g. g. Initial backfill shall be placed in increments not to exceed 6 inches in depth.
SPS 382.30(11)(e)2.h. h. Initial backfill shall be well tamped for the full width of the trench and length of the sewer.
SPS 382.30(11)(e)3. 3. `Unstable bottom.' Where a mucky or unstable bottom is encountered in the trench, the required dry and stable foundation conditions shall be provided by providing one of the following options:
SPS 382.30(11)(e)3.a. a. Sheathing shall be driven and left in place to a depth of 48 inches below the trench bottom or to solid foundation to a lesser depth.
SPS 382.30(11)(e)3.b. b. Removal of wet and yielding material to a depth of 24 inches or to solid material and replacement of the unstable material with limestone screenings, pea gravel or equivalent material.
SPS 382.30(11)(e)3.c. c. Install a longitudinally reinforced concrete cradle the width of the trench and at least 3 inches thick.
SPS 382.30(11)(e)3.d. d. Install a longitudinally reinforced concrete slab the width of the trench and at least 3 inches thick.
SPS 382.30(11)(e)3.e. e. Backfill and bedding shall comply with subd. 2. d. to h.
SPS 382.30(11)(e)4. 4. `Backfill completion.' Care shall be exercised in placing the balance of the backfill to prevent breakage of the pipe. Large boulders or rock, concrete slabs, or frozen masses shall not be used in the backfill. At least 36 of backfill cover shall be provided over the top of the pipe before the pipe trench is wheel-loaded.
SPS 382.30(11)(e)5. 5. `Pipe openings protected.' The ends of all pipes not immediately connected shall be closed so as to prevent the introduction of earth or drainage from an excavation.
SPS 382.30(11)(f) (f) Connection to public sewer. The connections of building sewers to public sewers shall be in accordance with conditions of approval for the public sewer granted by the department of natural resources under s. 281.41, Stats.
SPS 382.30(11)(f)1. 1. `Gravity public sewer.' When a building sewer connection to the public sewer is not found within 3 feet of the point designated by the local governing body or its authorized representative, the connection shall be made in accordance with one of the provisions specified in subd. 1. a. to d.
SPS 382.30(11)(f)1.a. a. A saddle fitting approved by the department and acceptable to the municipality or sanitary district shall be installed.
SPS 382.30(11)(f)1.b. b. Where acceptable to the municipality or sanitary district a portion of the main sewer may be removed and a tee or wye fitting approved by the department may be inserted with compression joints in the public sewer acceptable to the municipality or the sanitary district. The insertion shall be made under the supervision of the authorized representative of the municipality or the sanitary district.
SPS 382.30(11)(f)1.c. c. When the public sewer is concrete or clay, the end of the connecting sewer may be set upon or in an opening cut into the top half of the public sewer, but shall not protrude into the public sewer. The connection shall be secured by encasing the main sewer pipe and the connection in concrete at least 3" thick so as to assure permanency of the connection and adequate backing of the public sewer pipe.
SPS 382.30(11)(f)1.d. d. In lieu of the use of a fitting and in the event that an opening cannot be located in the top half of the public sewer, a length of concrete or clay public sewer pipe may be removed and a section with a wye fitting shall be inserted in its place. The joints at the ends of the section shall be encased in concrete at least 3" thick. The connection or insertion shall be made under the supervision of the authorized representative of the municipality or the sanitary district.
SPS 382.30(11)(f)2. 2. `Pressurized public sewer.' Where a forced building sewer discharges to a pressurized public sewer all of the following requirements shall apply:
SPS 382.30(11)(f)2.a. a. A curb stop shall be installed on the same property as close as possible to the connection to the common forced main sewer.
SPS 382.30(11)(f)2.b. b. A check valve shall be installed in the pressurized building drain or building sewer.
SPS 382.30(11)(f)2.c. c. An accessible quick disconnect shall be installed upstream of the check valve.
SPS 382.30 Note Note: See ch. SPS 382 Appendix for further explanatory material.
SPS 382.30(11)(g) (g) Prohibited installations.
SPS 382.30(11)(g)1.1. `Harmful discharge.' No person may connect to a public sewer any building drain or building sewer through which is discharged any substance likely to cause undue corrosion, obstruction, nuisance, explosion or interference with sewage treatment processes.
SPS 382.30(11)(g)2. 2. `Storm water and clear water connections.' Except as provided in s. SPS 382.36 (3), storm drain piping and clear water drain piping may not discharge to a sanitary building drain which connects to a publicly-owned treatment works.
SPS 382.30 Note Note: See s. SPS 382.36 for provisions relative to storm sewers.
SPS 382.30(11)(h) (h) Locating requirements. A means to locate buried non-metallic sewers and private interceptor main sewers discharging to municipal mains shall be accomplished in accordance with one of the following options:
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Published under s. 35.93, Stats. Updated on the first day of each month. Entire code is always current. The Register date on each page is the date the chapter was last published.