DEPARTMENT OF LICENSING AND REGULATORY AFFAIRS

DIRECTOR’S OFFICE

CONSTRUCTION CODE

Filed with the secretary of state on

These rules become effective 120 days after filing with the secretary of state. 

(By authority conferred on the director of the department of licensing and regulatory affairs by section 4 of the Stille- Derossett DeRossett-Hale single state construction code act, 1972 PA 230, MCL 125.1504, and Executive Reorganization Order Nos. 2003-1, 2008-4, and 2011-4, MCL 445.2011, 445.2025, and 445.2030) 

R 408.30701, R 408.30711, R 408.30716, R 408.30727, R 408.30729, R 408.30755, R 408.30758, and R 408.30762 of the Michigan Administrative Code are amended, R 408.30725d, R 408.30725e, R 408.30725f, R 408.30725g, R 408.30725h, R 408.30726a, R 408.30727a, R 408.30727b, R 408.30727c, R 408.30729a, R 408.30729b, R 408.30732, R 408.30736, R 408.30753b, R 408.30755a, R 408.30758a, and R 408.30758b are added, as follows:

PART 7.  PLUMBING CODE

AMENDMENTS AND ADDITIONS TO BASIC PLUMBING CODE

R 408.30701  Applicable code.

  Rule 701.  Rules governing the installation, replacement, alteration, relocation, and use of plumbing systems or plumbing materials are those contained in the international plumbing code, 20182021 second printing edition, including appendices A, B, C, D, and E, F, and G, except for sections 103.1, 103.2, 103.3, 104.2, 104.5 to 104.7, 104.8, 104.8.1, 106.3,106.3.1, 106.3.2, 106.5.5, 106.6.1, 106.6.2, 106.6.3, 107.2.5, 107.2.5.1, 107.2.5.2, 107.2.5.3, 108.2.5, 108.2.5.1, 108.2.5.2, 108.3, 109.2 to 109.5, 113.1 to 113.4,114.1 to 114.4, 115.3, 404.2, 404.3, 602.3 to 602.3.5.1, 608.18 to 608.18.8, 712.3.3.1, 712.3.3.2, 715.1 to 715.4, 802.4.3.1, 1106.3, 1106.6, 1301 to 1304.4.2, 1401 to 1403.2.1 and tables 608.18.1, 1106.3, and 1106.6.  With the exceptions noted, the code is adopted in these rules by reference.  All references to the International Building Code, International Residential Code, International Energy Conservation Code, InternNational Electrical Code, International Mechanical Code, and International Plumbing Code mean the Michigan Building Code, Michigan Residential Code, Michigan Energy Code, Michigan Electrical Code, Michigan Mechanical Code, and Michigan Plumbing Code, respectively.  The code is available for inspection, and purchase at the Lansing office of the Michigan dDepartment of lLicensing and rRegulatory aAffairs, bBureau of cConstruction cCodes, 611 West Ottawa Street, First Floor Ottawa Building, Lansing, Michigan 48933. for $83.00 for each code book. The code may be purchased from the International Code Council, through the bureau’s website at www.michigan.gov/bcc, at a cost as of the time of adoption of these rules of for $83.0087.50 for each code book.

AMENDMENTS AND ADDITIONS TO BASIC PLUMBING CODE

R 408.30711  Title and scope.

  Rule 711.  Sections 101.1, 101.2, and 101.3 of the code are amended to read as follows:

  101.1.  Title.  This part shall be known as the Michigan plumbing code and is hereinafter to be referred to as “the plumbing code” or “the code.”  This part shall control all matters concerning the installation, replacement, alteration, relocation, and use of plumbing systems or plumbing materials as herein defined in this code and shall apply to existing or proposed buildings and structures in the this state.

  101.2.  Scope.  The design and installation of plumbing systems, including sanitary and storm drainage, sanitary facilities, medical gas systems, water supplies, water service, and storm water and sewage disposal in and exiting buildings, shall comply with the requirements of the code.  The design and installation of gas piping, chilled water piping in connection with refrigeration process and comfort cooling, and hot water piping in connection with building heating systems shall conform to the Michigan mechanical code.  The design and installation of all fire sprinkler systems and standpipe systems shall conform to the Michigan building code.  Water and drainage connections to such installations shall be made in accordance with the requirements of the code.

  Exception:  Detached 1-and 2-family dwellings and multiple single-family dwellings, (townhouses) such as townhouses, not more than 3 stories high with separate means of egress and their accessory structures shall comply with the Michigan residential code.

  101.3.  Intent.  The purpose of this code and the Stille-DeRossett-Hale single state construction code act, 1972 PA 230, MCL 125.1501 to 125.1531 is to establish minimum standards to provide a reasonable level of safety, health, property protection, and public welfare by regulating and controlling the design, construction, installation, quality of materials, location, and operation and maintenance or use of plumbing equipment and systems.  The act Stille-DeRossett-Hale single state construction code act, 1972 PA 230, MCL 125.1501 to 125.1531, takes precedence over all provisions of this code.

R 408.30716  Fees.

  Rule 716.  Section 106.6 109.1 of the code is amended to read as follows:

  Rule 106.6.109.1. Fees.  The fees prescribed by the act shall be paid to the enforcing agency of the jurisdiction before a permit to begin work for new construction, alteration, removal, demolition, or other building operation may be issued. In addition, an amendment to a permit necessitating an additional fee shall not be approved until the additional fee is paid. The authority having jurisdiction may withhold issuance of any newly requested permits to an individual who has outstanding permit fees owed to that authority having jurisdiction.

R 408.30725d  Type of fixtures.

  Rule 725d.  Section 915.1 is added to the code to read as follows:

  915.1. Type of fixtures.  A combination waste and vent system shall not serve fixtures other than floor drains, sinks, lavatories and drinking fountains. Combination waste and vent systems shall not receive the discharge from a food waste disposer or clinical sink.

R 408.30725e  Fixture traps.

  Rule 725e.  Section 1002.1 is added to the code to read as follows:

  1002.1. Fixtures traps.  Each plumbing fixture shall be separately trapped by a liquid-seal trap, except as otherwise allowed by this code. The vertical distance from the fixture outlet to the trap weir shall not exceed 24 inches, 609.6 mm, and the horizontal distance shall not exceed 30 inches, 762 mm, measured from the centerline of the fixture outlet to the centerline of the inlet of the trap. The height of a clothes washer standpipe above a trap shall conform to section 802.4.3. A fixture shall not be double trapped.

  Exceptions: 

  1.  This section shall not apply to fixtures with integral traps. 

  2.  A combination plumbing fixture is allowed to be installed on 1 trap, provided that 1 compartment is not more than 6 inches, 152 mm, deeper than the other compartment and the waste outlets are not more than 30 inches, 762 mm, apart. 

  3.  A grease interceptor intended to serve as a fixture trap in accordance with the manufacturer's installation instructions shall be allowed to serve as the trap for a single fixture or a combination sink of not more than 3 compartments where the vertical distance from the fixture outlet to the inlet of the interceptor does not exceed 30 inches, 762 mm, and the developed length of the waste pipe from the most upstream fixture outlet to the inlet of the interceptor does not exceed 60 inches, 1524 mm.

  4.  Floor drains in multilevel parking structures that discharge to a building storm sewer shall not be required to be individually trapped. Where floor drains in multilevel parking structures are required to discharge to a combined building sewer system, the floor drains shall not be required to be individually trapped provided that they are connected to a main trap in accordance with section 1103.1.

R 408.30725f  Inspection and testing of backflow prevention assemblies. 

  Rule 725f.  Section 312.10 is added to the code to read as follows:

  312.10. Inspection and testing of backflow prevention assemblies.  Inspection and testing shall comply with section 312.10.1 and 312.10.2

R 408.30725g  Inspections.

  Rule 725g.  Section 312.10.1 is added to the code to read as follows:

  312.10.1. Inspections.  Inspections shall be made of all backflow prevention assemblies and air gaps after installation or relocation to determine whether the assemblies are operable and air gaps exist. 

R 408.30725h  Testing. 

  Rule 725h.  Section 312.10.2 is added to the code to read as follows:

  312.10.2. Testing.  Reduced pressure principle, double check, pressure vacuum breaker, reduced pressure detector fire protection, double check detector fire protection, and spill-resistant vacuum breaker backflow preventer assemblies and hose connection backflow preventers shall be tested at the time of installation, immediately after repairs or at the time of relocation. Test gauges shall comply with ASSE 1064. The testing procedure shall be performed in accordance with 1 of the following standards: 

   (a) ASSE 5013.

   (b) ASSE 5015. 

   (c) ASSE 5020.

   (d) ASSE 5047. 

   (e) ASSE 5048.

   (f) ASSE 5052.

   (g) ASSE 5056.

   (h) CSA B64.10.

   (i) CSA B64.10.1. 

R 408.30726a  Pipe fittings.

  Rule 726a.  Section 702.4 is added to the code to read as follows: 

Table 702.4

PIPE FITTINGS

MATERIAL

STANDARD

Acrylonitrile butadiene styrene (ABS) plastic pipe in IPS diameters

ASME A112.4.4; ASTM D2661; ASTM F628; CSA B181.1

Acrylonitrile butadiene styrene (ABS) plastic pipe in sewer and drain diameters

ASTM D2751

Cast iron

ASME B16.4; ASME B16.12; ASTM A74; ASTM A888; CISPI 301

Copper or Copper alloy 

ASME B16.15; ASME B16.18; ASME B16.22; ASME B16.23; ASME B16.26; ASME B16.29

Galvanized steel pipe 

ASTM A53

Glass 

ASTM C1053

Gray iron and ductile iron

AWWA C110/A21.10

Polyethylene

ASTM D2683

Polyolefin 

ASTM F1412; CSA B181.3

Polyvinyl chloride (PVC) plastic in IPS diameters

ASME A112.4.4; ASTM D2665; ASTM F1866

Polyvinyl chloride (PVC) plastic pipe in sewer and drain diameters

ASTM D3034

Polyvinyl chloride (PVC) plastic pipe with a 3.25-inch O.D.

ASTM D2949

Polyvinylidene fluoride (PVDF) plastic pipe

ASTM F1673; CSA B181.3

Stainless steel drainage system, Types 304 and 316L

ASME A112.3.1

Steel

ASME B16.9; ASME B16.11; ASME B16.28

Vitrified clay

ASTM C700

R 408.30727  Water distribution pipe.

  Rule 727. Table 605.4 of the code is amended to read as follows:

Table 605.4

WATER DISTRIBUTION PIPE

(REFERENCE R 408.30732, SECTION 605.2.1)

R 408.30727a  Location of full-open valve.

  Rule 727a.  Section 606.1 is added to the code to read as follows:

  606.1. Location of full-open valve.  Full-open valves shall be installed in the following locations: 

  1.  On the building water service pipe from the public water supply near the curb.

  2.  On the water distribution supply pipe at the entrance into the structure.

  2.1.  In multiple tenant buildings, where a common water supply piping system is installed to supply spaces other than 1 and 2 family dwellings, a main shutoff valve shall be provided for each tenant or space. 

  3.  On the discharge side of every water meter.

  4.  On the base of every water riser pipe in occupancies other than multiple-family residential occupancies that are 2 stories or less in height and in 1 and 2 family residential occupancies.

  5.  On the top of every water down-feed pipe in occupancies other than 1 and 2 family residential occupancies.

  6.  On the entrance to every water supply pipe to a dwelling unit, except where supplying a single fixture equipped with individual stops.

  7.  On the water supply pipe to a gravity or pressurized water tank.

  8.  On the water supply pipe to every water heater. 

R 408.30727b  Labeling of water distribution pipes in bundles.

  Rule 727b.  Section 606.7 is added to the code to read as follows:

  606.7. Labeling of water distribution pipes in bundles.  Where water distribution piping is bundled at installation, each pipe in the bundle shall be identified using stenciling, commercially available pipe labels, or approved color-coded piping materials. The identification shall indicate the pipe contents and the direction of flow in the pipe. The interval of the identification markings on the pipe shall not exceed 25 feet, 7620mm. There shall be at least 1 identification label on each pipe in each room, space, or story. 

R 408.30727c  Tempered water temperature control.

  Rule 727c.  Section 607.1.2 is added to the code to read as follows:

  607.1.2. Tempered water temperature control.  Tempered water shall be controlled by 1 of the following:

   1. A limiting device conforming to ASSE 1070/ASME A112.1070/CSA B125.70 and set to not greater than 110 degrees Fahrenheit or 43 degrees Celsius. 

   2. A thermostatic mixing valve conforming to ASSE 1017.

   3. A water heater conforming to ASSE 1082.

   4. A water heater conforming to ASSE 1084.

   5. Emergency eye wash tepid water limits shall not be less than 60 degrees Fahrenheit or 15.6 degrees Celsius and not greater than 100 degrees Fahrenheit or 37.8 degrees Celsius and conform to ASSE 1071.

R 408.30729  Water service pipe.  

   Rule 729.  Table 605.3 and section 609.3 of the code are amended to read as follows:

Table 605.3

Water Service Pipe WATER SERVICE PIPE

(REFERENCE R 408.30732, SECTION 605.2.1)

609.3 Hot water.  Hot water shall be provided to supply all of the hospital fixtures, kitchen, and laundry requirements.  Special fixtures and equipment shall have hot water supplied at a temperature specified by the manufacturer.  The hot water system shall be installed in accordance with section 607.

R 408.30729a.  Pipe fitting.

   Rule 729a. Table 605.5 is added to the code to read as follows:

Table 605.5

PIPE FITTINGS

(REFERENCE R 408.30732, SECTION 605.2.1)

R 408.30729b  Manufactured pipe nipples.

   Rule 729b. Table 605.8 is added to the code to read as follows:

 Table 605.8

MANUFACTURED PIPE NIPPLES

(REFERENCE R 408.30732, SECTION 605.2.1)

R 408.30732  Lead content of drinking water pipe and fittings.

  Rule 732.  Section 605.2.1 is added to the code to read as follows:

  605.2.1. Lead content of drinking water pipe and fittings.

Pipe, pipe fittings, joints, valves, faucets, and fixture fittings utilized to supply water for drinking or cooking purposes shall comply with NSF 372 and shall have a weighted average lead content of 0.25% or less.

R 408.30736  Water supply.

  Rule 736.  Section 411.3 is added to the code to read as follows:

  411.3. Water supply.  Where hot and cold water is supplied to an emergency shower or eyewash station, the temperature of the water supply shall only be controlled by a temperature-actuated mixing value complying with ASSE 1071. Where water is supplied directly to an emergency shower or eyewash station from a water heater, the water heater shall comply with ASSE 1085, section 607.1.2. 

R 408.30753b  Roof extension unprotected.

  Rule 753b.  Section 903.1.1 is added to the code to read as follows:

  903.1.1. Roof extension unprotected.  Open vent pipes that extend through a roof shall be terminated not less than 12 inches, 304.8 mm, above the roof.

R 408.30755  Storm drainage.

   Rule 755.  Table 1102.4 of the code is amended to read as follows:

TABLE 1102.4

BUILDING STORM SEWER PIPE

R 408.30755a  Rainfall rate conversion method.

  Rule 755a.  Section 1106.2.1 is added to the code to read as follows:

  1106.2.1. Rainfall rate conversion method.  The rainfall rate falling on a roof surface shall be converted to a gallon per minute (L/m) flow rate in accordance with equation 11-1. 

R 408.30758  Minimum number of fixtures.

  Rule 758.  Sections 403.1, 403.1.1 and 403.3.1 and Table 403.1 of the code are amended to read as follows:

  403.1.  Minimum number of fixtures. Plumbing fixtures shall be provided for the type of occupancy and in the minimum number shown in Table 403.1. Types of occupancies not shown in Table 403.1 shall be considered individually by the code official.  The number of occupants shall be determined in accordance with the Michigan building code.  Occupancy classification shall be determined in accordance with the Michigan building code.

  Exceptions:

  1.  The actual number of occupants determined by a supporting affidavit from the owner or agency.

  2.  Hand washing sinks in food service establishments shall be provided in accordance with section 6101 of the food law, 2000 PA 92, MCL 289.6101, incorporating by reference the United States Food and Drug Administration (FDA) food code 5-204.11 related to the location and placement of hand washing sinks. regulation no. 553, food establishments, R 285.553.1 to R 285.553.26 of the Michigan department of agriculture and rural development.

  3.  Toilet facilities for public swimming pools shall be provided in accordance with public swimming pools, R 325.2111 to R 325.2199 of the Michigan department of environmental quality.

  4.  Toilet facilities for childcare center, day care center, and nursery school facilities shall be provided in accordance with child day care licensing – childcare centers, R 400.8101 to R 400.8840 of the Michigan department of licensing and regulatory affairs.

  5.  Toilet facilities for children’s camps shall be provided in accordance with children’s and adult foster care camps, R 400.11101 to R 400.11413 of the Michigan department of licensing and regulatory affairs.

  403.1.1 Fixture calculations. To determine the occupant load of each sex, the total occupant load shall be divided in half. To determine the required number of fixtures, the fixture ratio or ratios for each fixture type shall be applied to the occupant load of each sex in accordance with table 403.1. Fractional numbers resulting from applying the fixture ratios of table 403.1 shall be rounded up to the next whole number. For calculations involving multiple occupancies, the fractional numbers for each occupancy shall be summed and rounded up to the next whole number.

  Exceptions:

  1.  The total occupant load shall not be required to be divided in half where approved statistical data indicate a distribution of the sexes of other than 50% of each sex.

  2.  Where multiple-user facilities are designed to serve all genders, the minimum fixtures count shall be calculated at 100%, based on total occupant load. The minimum number of required plumbing fixtures shall be in accordance with table 403.1. In multiple-user facilities, each fixture type shall be in accordance with ICC A117.1 and each urinal that is provided shall be located in a stall.

   3.  Distribution of the sexes is not required where single-user water closets and bathing room fixtures are provided in accordance with section 403.1.2.

  403.3.1.  Access.  The route to the public toilet facilities required by section 403.3 shall not pass through kitchens, storage rooms, or closets. Access to the required facilities shall be from within the building. All routes shall comply with the accessibility’s accessibility requirements of the Michigan building code. The public shall have access to the required toilet facilities at all times that the building is occupied.

TABLE 403.1

MINIMUM NUMBER OF REQUIRED PLUMBING FIXTURES^a

(See Sections 403.1.1 and 403.2)

a. The fixtures shown are based on 1 fixture being the minimum required for the number of individuals persons indicated or any fraction of the number of individuals persons indicated. The number of occupants shall be determined by the International Building Code International Building Code.

b. Toilet facilities for employees shall be separate from facilities for inmates or care patients.

c. A single-occupant toilet room with 1 water closet and 1 one lavatory serving not more than 2 adjacent patient sleeping units shall be allowed permitted where such room is provided that with direct access from each patient sleeping unit has direct access to the toilet room and with provisions for privacy. for the toilet room user is provided.

d. The occupant load for seasonal outdoor seating and entertainment areas shall be included when determining the minimum number of facilities required.

e. The minimum number of required drinking fountains shall comply with Table 403.1 and Chapter 11 of the International Building Code. For business and mercantile classifications with an occupant load of 15 or fewer, service sinks shall not be required.

f. Drinking fountains are not required for an occupant load of 15 or fewer. The required number and type of plumbing fixtures for outdoor public swimming pools shall be in accordance with section 609 of the International Swimming Pool and Spa Code.

g. For business and mercantile occupancies with an occupant load of 15 or fewer, service sinks shall not be required.

h. Structures not designed for occupants or as an employee’s regular working area, are not required to have toilet facilities.

i.  Water closets and lavatories in adjacent school buildings may be included in the required minimum fixture count, if they are located within  a 500-foot walking distance to the stadium.  Signage for the location of these rest rooms is required.

R 408.30758a  High and low drinking fountains minimum number.

  Rule 758a.  Section 410.3.1 is added to the code to read as follows:

  410.3.1. High and low drinking fountains minimum number.  Where drinking fountains are required, no fewer than 2 drinking fountains shall be provided. One drinking fountain shall comply with the requirements for people who use a wheelchair, and 1 drinking fountain shall comply with the requirements for standing individuals. 

  Exceptions: 

  1.  A single drinking fountain with 2 separate spouts that complies with the requirements for individuals who use a wheelchair and standing individuals shall be allowed to be substituted for 2 separate drinking fountains.

  2.  Where drinking fountains are primarily for children’s use, the drinking fountains for people using wheelchairs shall be allowed to comply with the children’s provisions in ICC A117.1 and drinking fountains for standing children shall be allowed to have the spout at 30 inches, 762 mm, minimum above the floor. 

  3.  Referencing building code for all height requirements of drinking fountains and water coolers. 

R408.30758b  Water supply. 

  Rule 758b. Section 411.3 is added to the code to read as follows:

  411.3. Water supply.  Where hot and cold water are supplied to an emergency shower or eyewash station, the temperature of the water supply shall only be controlled by temperature-actuated mixing value complying with ASSE 1071. Where water is supplied directly to an emergency shower or eyewash station from a water heater, the water heater shall comply with ASSE 1085, See section 607.1.2.

R 408.30762  Floor drains; public toilet rooms.

   Rule 762. Section 412.5 413.5 is added to the code to read as follows:

  412.5. 413.5. Floor drains; public toilet rooms. In all public toilet rooms that contain a combination of 3 or more water closets or urinals, at least 1 approved floor drain shall be installed connecting to the sanitary system;. hHowever, stall urinals may serve as floor drains if the entire floor can be drained to the urinals.