DEPARTMENT OF LICENSING AND REGULATORY AFFAIRS  
DIRECTOR’S OFFICE  
CONSTRUCTION CODE  
(By authority conferred on the director of the department of licensing and regulatory  
affairs by section 4 of the Stille-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)  
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, 2021 second printing edition, including appendices B, C, D, and E,  
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, 106.5.5,108.2.5, 108.2.5.1, 108.2.5.2, 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, National  
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 Department of Licensing and Regulatory Affairs, Bureau of Construction  
Codes, 611 West Ottawa Street, First Floor Ottawa Building, Lansing, Michigan 48933.  
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  
$87.50 for each code book.  
History: 1979 AC; 1980 AACS; 1982 AACS; 1985 AACS; 1989 AACS; 1992 AACS; 1998-2000  
AACS; 2001 AACS; 2003 AACS; 2007 AACS; 2010 AACS; 2013 AACS; 2016 AACS; 2021 AACS;  
2023 MR 22, Eff. Mar. 12, 2024.  
R 408.30709 Rescission.  
Rule 709. Rules 1 to 141 of the rules of the state plumbing board, being R 338.901  
to R 338.914 of the Michigan Administrative Code and appearing on pages 3801 to  
3818 of the 1954 volume of the Code, are rescinded.  
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History: 1979 AC.  
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 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 defined in this code and shall apply to existing or  
proposed buildings and structures in 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, 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 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.  
History: 1979 AC; 1980 AACS; 1982 AACS; 1998-2000 AACS; 2001AACS; 2010 AACS; 2013  
AACS; 2021 AACS; 2023 MR 22, Eff. Mar. 12, 2024.  
R 408.30712 Rescinded.  
History: 1979 AC; 1980 AACS; 1982 AACS; 1998-2000 AACS; 2001 AACS.  
R 408.30713 Rescinded.  
History: 1982 AACS; 199-2000 AACS; 2001 AACS; 2010 AACS; 2016 AACS.  
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R 408.30714 Rescinded.  
History: 1979 AC; 1980 AACS; 1982 AACS; 1998-2000 AACS; 2001 AACS; 2010 AACS.  
R 408.30715 Permits.  
Rule 715. Sections 106.5.3 and 106.5.4 of the code are amended to read as follows:  
106.5.3. Expiration. Each permit issued by the code official under the provisions of  
the code shall expire by limitation and become null and void if the work authorized by  
this permit is not commenced within 180 days from the date of such permit, or if the  
work authorized by this permit is suspended or abandoned at any time after the work is  
commenced for a period of 180 days. Before this work may be recommenced, the permit  
shall be reinstated if the code has not changed. If the code has changed and the work was  
not started, a new permit shall be first obtained for such work, provided no changes have  
been made or will be made in the original construction document for this work and  
provided further that the suspension or abandonment has not exceeded 1 year.  
106.5.4. Application and extensions. The authority having jurisdiction may grant a  
180-day extension of the original permit time period of 180 days, upon presentation by  
the permittee of a satisfactory reason for failure to start or complete the work or activity  
authorized by the permit.  
History: 1979 AC; 1982 AACS; 1985 AACS; 1992 AACS; 1998-2000 AACS; 2001 AACS; 2003  
AACS; 2013 AACS; 2016 AACS; 2021 AACS.  
R 408.30716 Fees.  
Rule 716. Section 109.1 of the code is amended to read as follows:  
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.  
History: 1982 AACS; 1998-2000 AACS; 2001 AACS; 2003 AACS; 2007 AACS; 2023 MR 22, Eff.  
Mar. 12, 2024.  
R 408.30717 Right of entry.  
Rule 717. Section 104.4 of the code is amended to read as follows:  
104.4 Right of entry. If a building or premises is occupied, the code official shall  
present his or her credentials to the occupant and request entry. If a building or premises  
is unoccupied, the code official shall first make a reasonable effort to locate either the  
owner, the owner’s authorized agent or other person having care or control of the  
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building or premises and request entry. If entry is refused, the code official has recourse  
to every remedy provided by law to secure entry.  
When a code official has first obtained a proper inspection warrant or other remedy  
provided by law to secure entry, the owner, owner’s authorized agent or occupant or  
person having charge, care or control of the building or premises shall not fail or neglect,  
after a proper request is made as provided in this rule, to permit the code official prompt  
entry into the building or premises to inspect or examine the building or premises  
pursuant to this code.  
History: 1982 AACS; 1985 AACS; 1998-2000 AACS; 2001 AACS; 2003 AACS; 2007 AACS; 2010  
AACS; 2013 AACS; 2021 AACS.  
R 408.30718 Violation penalties.  
Rule 718. Section 108.4 of the code is amended to read as follows:  
108.4. Violation penalties. A person who violates a provision of the code, who fails  
to conform with any of the requirements thereof, or who erects, installs, alters, or repairs  
plumbing work in violation of the approved construction documents or directive of the  
enforcing agency, or a permit or certificate issued under the provisions of the code shall  
be subject to review and may result in licensing action pursuant to the skilled trades  
regulation act, 2016 PA 407, MCL 339.5101 to 339.5517.  
History: 1982 AACS; 1985 AACS; 1998-2000 AACS; 2001 AACS; 2003 AACS; 2007 AACS; 2021  
AACS.  
R 408.30719 Rescinded.  
History: 1982 AACS; 1985 AACS; 1998-2000 AACS; 2001 AACS; 2003 AACS; 2007 AACS; 2013  
AACS; 2021 AACS.  
R 408.30720 Rescinded.  
History: 1982 AACS; 1985 AACS; 1989 AACS; 1998-2000 AACS; 2001 AACS; 2003 AACS; 2007  
AACS; 2013 AACS; 2021 AACS.  
R 408.30721 Required tests.  
Rule 721. Sections 309.3 and 312.1 of the code are amended and section 312.3 is  
added to read as follows:  
309.3. Flood hazard areas subject to high-velocity wave action. Structures located  
in flood hazard areas subject to high-velocity wave action shall meet the requirements of  
section 309.2. The plumbing systems, pipes, and fixtures shall not be mounted on or  
penetrate through walls intended to break away under flood loads.  
312.1. Required tests. The permit holder shall make the applicable tests prescribed  
in sections 312.2 to 312.10.2 to determine compliance with the code. The permit holder  
shall give reasonable advance notice to the code official when the plumbing work is  
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ready for testing. The equipment, material, power, and labor necessary for the inspection  
and test shall be furnished by the permit holder and the permit holder shall be responsible  
for determining that the work will withstand the test pressure prescribed in this rule. All  
plumbing system piping shall be tested with either water or, for piping systems other than  
plastic, by air. After the plumbing fixtures have been set and their traps filled with water,  
the entire drainage system shall be submitted to final tests. The code official shall require  
the removal of any cleanouts if necessary to ascertain if the pressure has reached all parts  
of the system.  
Exception: Drainage and vent low pressure air tests for plastic piping systems shall  
be acceptable as prescribed in section 312.3 of the code.  
312.3 Drainage and vent air test. An air test shall be made by forcing air into the  
system until there is a uniform gauge pressure of 5 psi (34.5 kPa) or sufficient to balance  
a 10-inch (254 mm) column of mercury. This pressure shall be held for a test period of  
not less than 15 minutes. Any adjustments to the test pressure required because of  
changes in ambient temperatures or the seating of gaskets shall be made before the  
beginning of the test period.  
History: 2003 AACS; 2010 AACS; 2013 AACS; 2016 AACS.  
Editor's Note: An obvious error in R 408.30721 was corrected at the request of the promulgating  
agency, pursuant to Section 56 of 1969 PA 306, as amended by 2000 PA 262, MCL 24.256. The rule  
containing the error was published in Annual Administrative Code Supplement, 2016. The memorandum  
requesting the correction was published in Michigan Register, 2024 MR 1.  
R 408.30722 Separate facilities.  
Rule 722. Section 403.2 of the code is amended to read as follows:  
403.2. Separate facilities. Where plumbing fixtures are required, separate facilities  
shall be provided for each sex.  
Exceptions:  
1. Separate facilities shall not be required for private facilities.  
2. Separate facilities shall not be required in structures or tenant spaces with a total  
occupant load, including both employees and customers, of 15 or fewer.  
3. Separate facilities shall not be required in mercantile occupancies in which the  
maximum occupant load is 50 or fewer.  
History: 1979 AC; 1982 AACS; 2003 AACS; 2013 AACS.  
R 408.30723 Distance of trap from vent.  
Rule 723. Section 909.1 of the code is amended to read as follows:  
909.1 Distance of trap from vent. Each fixture trap shall have a protecting vent  
located so that the slope and the developed length in the fixture drain from the trap weir  
to the vent fitting are within the requirements in table 909.1.  
History: 1979 AC; 1982 AACS; 2003 AACS; 2007 AACS; 2013 AACS.  
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R 408.30724 Rescinded.  
History: 1979 AC; 1980 AACS; 1998-2000 AACS; 2010 AACS; 2013 AACS; 2016 AACS.  
R 408.30725 Industrial or commercial wastes.  
Rule 725.Section 302.2 of the code is amended to read as follows:  
302.2.Industrial or commercial wastes. Industrial or commercial wastes shall not  
be introduced into the public sewer or private disposal system without receiving prior  
approval in the following manner:  
(1)Industrial or commercial wastes discharged to a public sewer system are subject  
to review, approval, and regulation by the owner of the sewage treatment system  
under the authority of the federal water pollution control act of 1972, as amended, 33  
U.S.C.1251 et seq., and sections 3101 to 3119 of Act No. 451 of the Public Acts of  
1994, as amended, being 324.3101 to 324.3119 of the Michigan Compiled Laws.  
(2)Industrial or commercial wastes discharged to an on-site disposal system are  
subject to review, approval, and regulation by the Michigan department of environmental  
quality under the authority of sections 3101 to 3119 of Act No.  
451 of the Public Acts of 1994, as amended, being 324.3101 to 324.3119 of the  
Michigan Compiled Laws.  
(3)Industrial or commercial wastes discharged to an on-site holding tank are  
subject to review, approval, and regulation under sections 3101 to 3119, 11101 to 11152,  
and 12101 to 12118 of Act No. 451 of the Public Acts of 1994, as amended, being  
324.3101 to 324.3119, 324.11101 to 324.11152 and 324.12101 to 324.12118 of the  
Michigan Compiled Laws, and the federal resource conservation and recovery act of  
1976, as amended, 42 U.S.C.6901 et seq.  
History: 1979 AC; 1982 AACS; 1985 AACS; 1989 AACS; 1998-2000 AACS.  
Editor's Note: An obvious error in R 408.30725 was corrected at the request of the promulgating  
agency, pursuant to Section 56 of 1969 PA 306, as amended by 2000 PA 262, MCL 24.256. The rule  
containing the error was published in Annual Administrative Code Supplement, 1998-2000. The  
memorandum requesting the correction was published in Michigan Register, 2024 MR 1.  
R 408.30725a Radioactive material.  
Rule 725a.Section 302.2.1 is added to the code to read as follows:  
302.2.1.Radioactive material. Possession of radioactive material is regulated by  
state or federal license. The disposal of radioactive material shall not create a hazard to  
operational or maintenance personnel of the institution or to the public. Radioactive  
waste disposal is controlled by the Michigan department of environmental quality by  
conditions for disposal in a radioactive material license issued under the authority of part  
135 of Act No.368 of the Public Acts of 1978, as amended, being 333.13501 et seq.of  
the Michigan Compiled Laws, and the ionizing radiation rules, being R 325.5001 et seq.  
of the Michigan Administrative Code, or is controlled by the United  
Statesnuclear regulatory commission by conditions for disposal in a license issued under  
the authority of the atomic energy act of 1954, 42 U.S.C.2011 et seq.  
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History: 1979 AC; 1980 AACS; 1982 AACS; 1998-2000 AACS.  
R 408.30725b Rescinded.  
History: 1989 AACS; 1998-2000 AACS.  
R 408.30725c Venting of fixture drains.  
Rule 725c. Section 909.2 of the code is amended to read as follows:  
909.2. Venting of fixture drains. The vent for a fixture drain, except where serving  
a fixture with integral traps, such as water closets, shall connect above the weir of the  
fixture trap being vented. The total slope shall not exceed the diameter of the fixture  
drain.  
History: 1992 AACS; 1998-2000 AACS; 2007 AACS; 2010 AACS; 2013 AACS.  
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.  
History: 2023 MR 22, Eff. Mar. 12, 2024.  
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,  
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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.  
History: 2023 MR 22, Eff. Mar. 12, 2024.  
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  
History: 2023 MR 22, Eff. Mar. 12, 2024.  
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.  
History: 2023 MR 22, Eff. Mar. 12, 2024.  
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.  
History: 2023 MR 22, Eff. Mar. 12, 2024.  
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R 408.30726 Building sewer.  
Rule 726. Table 702.3 and section 703.1 of the code are amended to read as  
follows:  
Table 702.3  
BUILDING SEWER PIPE  
MATERIAL  
STANDARD  
Acrylonitrile butadiene styrene (ABS)  
ASTM D2661; ASTM F628; ASTM  
plastic pipe in IPS diameters, including F1488; CSA B181.1  
Schedule 40, DR 22 (PS 200) and DR 24  
(PS 140); with a solid, cellular core or  
composite wall  
Acrylonitrile butadiene styrene (ABS)  
plastic pipe in sewer and drain diameters,  
including SDR 42 (PS 20), PS 35, SDR 35  
(PS 45), PS 50, PS 100, PS 140, SDR 23.5  
(PS 150) and PS 200; with a solid, cellular  
core or composite wall.  
ASTM F1488; ASTM D2751  
Cast-iron pipe  
Concrete pipe  
ASTM A74; ASTM A888; CISPI 301  
ASTM C14; ASTM C76; CSA  
A257.1M; CSA A257.2M  
Copper or copper-alloy tubing (Type K  
ASTM B75; ASTM B88; ASTM B251  
or L)  
Polyethylene (PE) plastic pipe (SDR-  
PR)  
ASTM F714  
Polypropylene (PP) plastic pipe  
ASTM F2736; ASTM F2764; CSA  
B182.13  
Polyvinyl chloride (PVC) plastic pipe  
ASTM D2665; ASTM F891; ASTM  
in IPS diameters, including Schedule 40, F1488  
DR 22 (PS 200) and DR 24 (PS 140); with  
a solid, cellular core or composite wall  
Polyvinyl chloride (PVC) plastic pipe  
in sewer and drain diameters, including PS D3034; CSA B182.2; CSA B182.4  
25, SDR 41 (PS 28), PS 35, SDR 35 (PS  
46), PS 50, PS 100, SDR 26 (PS 115), PS  
140 and PS 200; with a solid, cellular core  
or composite wall.  
ASTM F891; ASTM F1488; ASTM  
Polyvinyl chloride (PVC) plastic pipe  
with a 3.25-inch O.D. and a solid, cellular  
core or composite wall  
ASTM D2949; ASTM F1488  
Polyvinylidene fluoride (PVDF) plastic  
pipe  
Stainless steel drainage systems, Types  
304 and 316L  
ASTM F1673; CSA B181.3  
ASME A112.3.1  
Vitrified clay pipe  
ASTM C4; ASTM C700  
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For SI: 1 inch = 25.4 mm.  
703.2 Drainage pipe in filled ground. Where a building sewer or building drain is  
installed on filled or unstable ground, the drainage pipe shall conform to one of the  
standards for ABS plastic pipe, cast-iron pipe, copper or copper-alloy tubing, or PVC  
plastic pipe indicated in Table 702.3.  
History: 1979 AC; 1982 AACS; 1985 AACS; 1989 AACS; 1998-2000 AACS; 2021 AACS.  
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  
Acrylonitrile butadiene styrene (ABS)  
plastic pipe in sewer and drain diameters  
Cast iron  
ASME A112.4.4; ASTM D2661;  
ASTM F628; CSA B181.1  
ASTM D2751  
ASME B16.4; ASME B16.12; ASTM  
A74; ASTM A888; CISPI 301  
ASME B16.15; ASME B16.18; ASME  
B16.22; ASME B16.23; ASME B16.26;  
ASME B16.29  
Copper or Copper alloy  
Galvanized steel pipe  
Glass  
ASTM A53  
ASTM C1053  
Gray iron and ductile iron  
Polyethylene  
AWWA C110/A21.10  
ASTM D2683  
Polyolefin  
ASTM F1412; CSA B181.3  
ASME A112.4.4; ASTM D2665;  
ASTM F1866  
Polyvinyl chloride (PVC) plastic in IPS  
diameters  
Polyvinyl chloride (PVC) plastic pipe  
in sewer and drain diameters  
Polyvinyl chloride (PVC) plastic pipe  
with a 3.25-inch O.D.  
Polyvinylidene fluoride (PVDF) plastic  
pipe  
ASTM D3034  
ASTM D2949  
ASTM F1673; CSA B181.3  
ASME A112.3.1  
Stainless steel drainage system, Types  
304 and 316L  
Steel  
ASME B16.9; ASME B16.11; ASME  
B16.28  
Vitrified clay  
ASTM C700  
History: 2023 MR 22, Eff. Mar. 12, 2024.  
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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  
MATERIAL  
STANDARD  
Chlorinated polyvinyl chloride (CPVC)  
plastic pipe and tubing  
ASTM D2846; ASTM F441; ASTM  
F442; CSA B137.6  
Chlorinated  
polyvinyl  
polyvinyl  
ASTM F2855  
chloride/aluminum/chlorinated  
chloride (CPVC/AL/CPVC)  
Copper or copper-alloy pipe  
Copper or copper-alloy tubing (Type K,  
WK, L, WL, M or WM)  
ASTM B42; ASTMB302; ASTM B43  
ASTM B75; ASTM B88; ASTM  
B251; ASTM B447  
Cross-linked polyethylene (PEX) plastic  
tubing  
ASTM F876; CSA B137.5  
Cross-linked  
ASTM F1281; ASTM F2262; CSA  
B137.10  
polyethylene/aluminum/cross-linked  
polyethylene (PEX-AL-PEX) pipe  
Cross-linked  
ASTM F1986  
polyethylene/aluminum/high-density  
polyethylene (PEX-AL-HDPE)  
Ductile iron pipe  
AWWA  
C115/A21.15  
ASTM A53  
C151/A21.51;  
AWWA  
Galvanized steel pipe  
Polyethylene/aluminum/polyethylene  
(PE-AL-PE) composite pipe  
Polyethylene of raised temperature (PE-  
RT) plastic tubing  
Polypropylene (PP) plastic pipe or  
tubing  
ASTM F1282  
ASTM F2769; CSA B137.18  
ASTM F2389; CSA B137.11  
Stainless steel pipe (Type 304/304L)  
Stainless steel pipe (Type 316/316L)  
ASTM A312; ASTM A778  
ASTEM A312; ASTEM A778  
(REFERENCE R 408.30732, SECTION 605.2.1)  
History: 2021 AACS; 2023 MR 22, Eff. Mar. 12, 2024.  
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.  
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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.  
History: 2023 MR 22, Eff. Mar. 12, 2024.  
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.  
History: 2023 MR 22, Eff. Mar. 12, 2024.  
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.  
History: 2023 MR 22, Eff. Mar. 12, 2024.  
R 408.30728 Sewer depth.  
Rule 728. Section 305.4.1 of the code is amended to read as follows:  
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305.4.1. Sewer depth. A building sewer that connects to a private disposal system  
shall be a minimum of 8 inches (203 mm) to the top of the pipe below finished grade at  
the point of septic tank connection. Building sewers shall be installed a minimum of 42  
inches (1067 mm) below grade.  
Exception: When permitted by the code official.  
History: 1989 AACS; 1998-2000 AACS; 2001 AACS; 2013 AACS.  
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  
MATERIAL  
STANDARD  
Acrylonitrile butadiene styrene (ABS)  
ASTM D1527; ASTM D2282  
plastic pipe  
Chlorinated polyvinyl chloride (CPVC)  
plastic pipe  
Chlorinated  
chloride/aluminum/chlorinated  
chloride (CPVC/AL/CPVC)  
Copper or copper-alloy pipe  
ASTM D2846; ASTM F441; ASTM  
F442; CSA B137.6  
polyvinyl  
polyvinyl  
ASTM F2855  
ASTM B42; ASTM B302  
ASTM B75; ASTM B88; ASTM  
B251; ASTM B447  
Copper or copper-alloy tubing (Type K,  
WK, L, WL, M or WM)  
Cross-linked polyethylene (PEX) plastic  
pipe and tubing  
ASTM F876; AWWA C904; CSA  
B137.5  
Cross-linked  
ASTM F1281; ASTM F2262;  
B137.10  
polyethylene/aluminum/cross-linked  
polyethylene (PEX-AS-PEX) pipe  
Cross-linked  
ASTM F1986  
polyethylene/aluminum/high-density  
polyethylene (PEX-AL-HDPE)  
Ductile iron water pipe  
AWWA  
C151/A21.51;  
AWWA  
C115/A21.15  
Galvanized steel pipe  
ASTM A53  
Polyethylene (PE) plastic pipe  
ASTM D2239; ASTM D3035;  
AWWA C901; CSA B137.11  
ASTM D2737; AWWA C901; CSA  
B137.1  
Polyethylene (PE) plastic tubing  
Polyethylene/aluminum/polyethylene  
(PE-AL-PE) pipe  
ASTM F1282; CSA B 137.9  
Polyethylene of raised temperature (PE-  
RT) plastic tubing  
ASTM F2769; CSA B137.18  
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Polypropylene (PP) plastic pipe or  
tubing  
ASTM F2389; CSA B137.11  
Polyvinyl chloride (PVC) plastic pipe  
ASTM D1785; ASTM D2241; ASTM  
D2672; CSA B137.3  
Stainless steel pipe (Type 304/304L)  
Stainless steel pipe (Type 316/316L)  
Chlorinated polyvinyl chloride (CPVC)  
plastic pipe and tubing  
ASTM A312; ASTM A778  
ASTM A312; ASTM A778  
ASTM D2846; ASTM F441; ASTM  
F442; CSA B137.6  
Chlorinated  
polyvinyl  
polyvinyl  
ASTM F2855  
chloride/aluminum/chlorinated  
chloride (CPVC/AL/CPVC)  
Copper or copper-alloy pipe  
ASTM B-42; ASTM B302; ASTM  
B43  
Copper or copper-alloy tubing (Type K,  
WK, L, WL, M or WM)  
ASTM B75; ASTM B88; ASTM  
B251; ASTM B447  
Cross-linked polyethylene (PEX) plastic  
tubing  
ASTM F876; CSA B137.5  
Cross-linked  
ASTM F1281; ASTM F2262; CSA  
B137.10  
polyethylene/aluminum/cross-linked  
polyethylene (PEX-AL-PEX) pipe  
Cross-linked  
ASTM F1986  
polyethylene/aluminum/high-density  
polyethylene (PEX-AL-HDPE)  
Ductile iron pipe  
AWWA  
C151/A21.51;  
AWWA  
C115/A21.15  
Polyethylene/aluminum/polyethylene  
(PE-AL-PE) composite pipe  
ASTM F1282  
Polyethylene of raised temperature (PE-  
RT) plastic tubing  
Polypropylene (PP) plastic pipe or  
tubing  
ASTM F2769; CSA B137.158  
ASTM F2389; CSA B137.11  
Stainless steel pipe (Type 304/304L)  
Stainless steel pipe (Type 316/316L)  
ASTM A312; ASTM A778  
ASTM A312; ASTM A778  
(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.  
History: 2021 AACS; History: 2023 MR 22, Eff. Mar. 12, 2024.  
R 408.30729a. Pipe fitting.  
Rule 729a. Table 605.5 is added to the code to read as follows:  
Table 605.5  
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PIPE FITTINGS  
MATERIAL  
Acrylonitrile butadiene styrene (ABS)  
STANDARD  
ASTM D2468  
plastic  
Cast iron  
ASME B16.4  
Chlorinated polyvinyl chloride (CPVC)  
Plastic  
ASSE 1061; ASTM D2846; ASTM  
F437; ASTM F438; ASTM F439; CSA  
B137.6  
Copper or copper alloy  
ASME B16.15; ASME B16.18;  
ASME B16.22; ASME B16.26; ASME  
B16.51; ASSE 1061; ASTM F1476;  
ASTM F1548; ASTM F3226  
ASTM F1986  
Cross-linked  
polyethylene/aluminum/high-density  
polyethylene (PEX-AL-HDPE)  
Fittings for cross-linked polyethylene  
(PEX) plastic tubing  
ASSE 1061; ASTM F877; ASTM  
F1807; ASTM F 1960; ASTM F2080;  
ASTM F2098, ASTM F2159; ASTM  
2434; ASTM F2735; CSA B137.5  
ASSE 1061; ASTM D3261; ASTM  
F1807; ASTM 2098; ASTM F2159;  
ASTM 2735; ASTM F2769; CSA  
B137.18  
Fittings for polyethylene of raised  
temperature (PE-RT) plastic tubing  
Galvanized steel pipe  
ASTM A53  
Gray iron and ductile iron  
ASTM F1476; ASTM F1548; AWWA  
C110/A21.10; AWWA C153/A21.53  
for ASTM F1281; ASTM F1282; ASTM  
Insert  
fittings  
polyethylene/aluminum/polyethylene (PE- F1974; CSA B137.9; CSA B137.10  
AL-PE) and cross-linked  
polyethylene/aluminum/cross-linked  
polyethylene (PEX-AL-PEX)  
Malleable iron  
ASME B16.3  
ASTM F1974  
Metal (brass) insert fittings for  
polyethylene/aluminum/polyethylene (PE-  
AL-PE)  
and  
cross-linked  
polyethylene/aluminum/cross-linked  
polyethylene (PEX-AL-PEX)  
Polyethylene (PE) plastic pipe  
ASTM D2609; ASTM D2683; ASTM  
D3261; ASTM F1055; CSA B137.1  
Polypropylene (PP) plastic pipe or  
tubing  
ASTM F2389; CSA B137.11  
Polyvinyl chloride (PVC) plastic  
ASTM D2464; ASTM D2466; ASTM  
D2467; CSA B137.2; CSA B137.3  
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Stainless steel (Type 304/304L)  
Stainless steel (Type 316/316L)  
Steel  
ASTM A312; ASTM A778; ASTM  
F1476; ASTM F1548; ASTM F3226  
ASTM A312; ASTM A778; ASTM  
F1476; ASTM F1548; ASTM F3226  
ASME B16.9, ASME B16.11; ASME  
B16.28; ASTM F1476; ASTM F1548  
(REFERENCE R 408.30732, SECTION 605.2.1)  
History: 2023 MR 22, Eff. Mar. 12, 2024.  
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  
MATERIAL  
Copper, copper alloy, and chromium-  
STANDARD  
ASTM B687  
plated  
Galvanized steel pipe  
Steel  
ASTM A53  
ASTM A773  
(REFERENCE R 408.30732, SECTION 605.2.1)  
History: 2023 MR 22, Eff. Mar. 12, 2024.  
R 408.30730 Sewer required.  
Rule 730. Section 701.2 of the code is amended and section 701.9 is added to read  
as follows:  
701.2. Sewer required. Every building in which plumbing fixtures are installed and  
all premises having drainage piping shall be connected to a public sewer, where  
available, or an approved private sewage disposal system.  
701.9. Connections. Direct connection of a steam exhaust, blowoff, or drip pipe  
shall not be made with the building drainage system. Waste water where discharged into  
the building drainage system shall be at a temperature not greater than 140◦F (60◦C).  
Where higher temperatures exist, approved cooling methods shall be provided.  
History: 1989 AACS; 1992 AACS; 1997 AACS; 2003 AACS; 2007 AACS; 2016 AACS.  
R 408.30731. Laundries.  
Rule 731. Sections 1002.6 and 1003.6 of the code are amended to read as follows:  
1002.6. Building traps. Building (house) traps shall be prohibited, except where  
local conditions necessitate these traps. Building traps shall be provided with a cleanout  
and a relief vent or fresh air intake on the inlet side of the trap. The size of the relief vent  
or fresh air intake shall not be less than ½ the diameter of the drain to which the relief  
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vent or air intake connects. The relief vent or fresh air intake shall be carried above grade  
and shall be terminated in a screened outlet located outside the building.  
1003.6. Laundries. Commercial laundries shall be equipped with an interceptor  
with a wire basket or similar device, removable for cleaning, that prevents passage into  
the drainage system of solids 0.5 inch (12.7 mm) or larger in size, string, rags, buttons, or  
other materials detrimental to the public sewage system.  
History: 1979 AC; 1982 AACS; 1997 AACS; 2007 AACS; 2016 AACS.  
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.  
History: 1979 AC; 1982 AACS; 1985 AACS; 1997 AACS; 2023 MR 22, Eff. Mar. 12, 2024.  
R 408.30733 Rescinded.  
History: 1979 AC; 1982 AACS; 1985 AACS; 1997 AACS.  
R 408.30734 Rescinded.  
History: 1979 AC; 1982 AACS; 1985 AACS; 1989 AACS; 1992 AACS; 1998-2000 AACS.  
R 408.30735 Hot water supply required.  
Rule 735. Section 607.1 of the code is amended to read as follows:  
607.1. Where required. (1) In residential occupancies, hot water shall be supplied  
to all plumbing fixtures and equipment utilized for bathing, washing, culinary purposes,  
cleansing, laundry, or building maintenance. In nonresidential occupancies, hot water  
shall be supplied for culinary purposes, cleansing, laundry, or building maintenance  
purposes. In nonresidential occupancies, hot water or tempered water shall be supplied  
for bathing and washing purposes. Tempered water shall be supplied through a water  
temperature limiting device that conforms to ASSE 1070, and shall limit the tempered  
water to a maximum of 110 degrees Fahrenheit (43 degrees Celsius). This provision does  
not supersede the requirement for protective shower valves in accordance with section  
424.3 of the code.  
(2) Tempered water shall be supplied to bathing and hand washing facilities in the  
occupancies identified in the following by individual water temperature limiting devices  
to individual fixtures:  
(a) Elementary schools.  
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(b) Child care centers.  
(c) Day care centers.  
(d) Nurseries.  
(e) Adult group homes.  
(f) Adult congregate homes.  
(g) Children’s camps.  
(h) At accessible plumbing fixtures.  
History: 1998-2000 AACS; 2001 AACS; 2007 AACS; 2016 AACS.  
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.  
History: 1979 AC; 1985 AACS; 1997 AACS; 2023 MR 22, Eff. Mar. 12, 2024.  
Editor's Note: An obvious error in R 408.30736 was corrected at the request of the promulgating  
agency, pursuant to Section 56 of 1969 PA 306, as amended by 2000 PA 262, MCL 24.256. The rule  
containing the error was published in Michigan Register, 2023 MR 22. The memorandum requesting the  
correction was published in Michigan Register, 2024 MR 1.  
R 408.30737 Rescinded.  
History: 1979 AC; 1989 AACS; 1998-2000 AACS.  
R 408.30738 Rescinded.  
History: 1979 AC; 1985 AACS; 1989 AACS; 1997 AACS.  
R 408.30738a Rescinded.  
History: 1989 AACS; 1998-2000 AACS.  
R 408.30739 Rescinded.  
History: 1989 AACS; 1992 AACS; 1997 AACS.  
R 408.30740 Rescinded.  
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History: 1989 AACS; 1998-2000 AACS.  
R 408.30740a Rescinded.  
History: 1989 AACS; 1992 AACS; 1998-2000 AACS; 2001 AACS; 2003 AACS.  
R 408.30740b Rescinded.  
History: 1989 AACS; 1998-2000 AACS.  
R 408.30741 Rescinded.  
History: 1979 AC; 1985 AACS; 1989 AACS.  
R 408.30741a Rescinded.  
History: 1979 AC; 1985 AACS; 1989 AACS.  
R 408.30741b Rescinded.  
History: 1979 AC; 1980 AACS; 1982 AACS; 1985 AACS; 1989 AACS.  
R 408.30741c Connections to automatic fire sprinkler systems and standpipe  
systems.  
Rule 741c. Section 608.17.4 of the code is amended to read as follows:  
608.17.4. Connections to automatic fire sprinkler systems and standpipe systems.  
The potable water supply to automatic fire sprinkler and standpipe systems shall be  
protected against backflow by a double check backflow prevention assembly, a double  
check fire protection backflow prevention assembly, or a reduced pressure principle fire  
protection backflow prevention assembly.  
Exception: Isolation of the water distribution system is not required for deluge,  
preaction, or dry pipe systems.  
History: 1979 AC; 1985 AACS; 1989 AACS; 1998-2000 AACS; 2001 AACS; 2003 AACS; 2007  
AACS; 2013 AACS; 2021 AACS.  
R 408.30742 Rescinded.  
History: 1979 AC; 1982 AACS; 1997 AACS.  
R 408.30743 Rescinded.  
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History: 1979 AC; 1982 AACS; 1997 AACS.  
R 408.30743a Rescinded.  
History: 1979 AC; 1985 AACS; 1998-2000.  
R 408.30743b Rescinded.  
History: 1979 AC; 1989 AACS; 1997 AACS.  
R 408.30743c Rescinded.  
History: 1989 AACS; 1992 AACS; 1998-2000 AACS.  
R 408.30744 Rescinded.  
History: 1979 AC; 1989 AACS; 1997 AACS.  
R 408.30744a Rescinded.  
History: 1989 AACS; 1998-2000 AACS.  
R 408.30744b Rescinded.  
History: 1989 AACS; 1992 AACS; 1998-2000 AACS.  
R 408.30744c Rescinded.  
History: 1989 AACS; 1998-2000 AACS.  
R 408.30744d Rescinded.  
History: 1989 AACS; 1998-2000 AACS.  
R 408.30744e Rescinded.  
History: 1992 AACS; 1998-2000 AACS; 2001 AACS; 2003 AACS.  
R 408.30744f Rescinded.  
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History: 1992 AACS; 1998-2000 AACS.  
R 408.30745 Rescinded.  
History: 1979 AC; 1989 AACS; 1997 AACS.  
R 408.30745a Rescinded.  
History: 1979 AC; 1982 AACS; 1989 AACS; 1997 AACS.  
R 408.30745b Rescinded.  
History: 1982 AACS; 1985 AACS; 1989 AACS; 1997 AACS.  
R 408.30746 Rescinded.  
History: 1979 AC; 1982 AACS; 1985 AACS; 1989 AACS; 1992 AACS; 1998-2000 AACS.  
R 408.30746a Rescinded.  
History: 1979 AC; 1982 AACS; 1989 AACS; 1992 AACS; 1997 AACS.  
R 408.30746b Rescinded.  
History: 1982 AACS; 1989 AACS; 1992 AACS; 1997 AACS.  
R 408.30747 Rescinded.  
History: 1979 AC; 1982 AACS; 1989 AACS; 1992 AACS; 1997 AACS.  
R 408.30747a Rescinded.  
History: 1982 AACS; 1985 AACS; 1992 AACS; 1998-2000 AACS.  
R 408.30747b Rescinded.  
History: 1982 AACS; 1985 AACS; 1989 AACS; 1992 AACS; 1998-2000 AACS.  
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R 408.30747c Rescinded.  
History: 1982 AACS; 1985 AACS; 1989 AACS; 1997 AACS.  
R 408.30748 Rescinded.  
History: 1979 AC; 1982 AACS; 1985 AACS; 1989 AACS; 1998-2000 AACS.  
R 408.30748a Rescinded.  
History: 1979 AC; 1980 AACS; 1982 AACS; 1997 AACS.  
R 408.30748b Rescinded.  
History: 1979 AC; 1980 AACS; 1982 AACS; 1997 AACS.  
R 408.30748c Rescinded.  
History: 1979 AC; 1980 AACS; 1982 AACS; 1997 AACS.  
R 408.30749 Special equipment; water supply protection.  
Rule 749. Section 608.3.1 of the code is amended to read as follows:  
608.3.1. Special equipment; water supply protection. The water supply for hospital  
fixtures shall be protected against backflow with a reduced pressure principle backflow  
prevention assembly, an atmospheric or spill-resistant vacuum breaker assembly, or an  
air gap. Vacuum breakers for bedpan washer hoses, autopsy tables, and hose connections  
in health care or laboratory areas shall not be located less than 6 feet (1829 mm) above  
the floor.  
History: 1979 AC; 1982 AACS; 1985 AACS; 1989 AACS; 1998-2000 AACS; 2001 AACS; 2007  
AACS; 2010 AACS; 2013 AACS.  
R 408.30749a Rescinded.  
History: 1989 AACS; 1992 AACS; 1998-2000 AACS.  
R 408.30750 Rescinded.  
History: 1979 AC; 1980 AACS; 1982 AACS; 1989 AACS; 1992 AACS; 1998-2000 AACS.  
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R 408.30751 Rescinded.  
History: 1979 AC; 1982 AACS; 1997 AACS.  
R 408.30751a Rescinded.  
History: 1992 AACS; 1998-2000 AACS.  
R 408.30752 Rescinded.  
History: 1979 AC; 1980 AACS; 1997 AACS.  
R 408.30752a Rescinded.  
History: 1979 AC; 1982 AACS; 1997 AACS.  
R 408.30753 Rescinded.  
History: 1954 ACS 81, Eff. May 19, 1975; 1954 ACS 91, Eff. June 16, 1977.  
R 408.30753a Roof extensions.  
Rule 753a. Section 903.1 of the code is amended to read as follows:  
903.1. Roof extension. All open vent pipes that extend through a roof shall be  
terminated at least 1 foot (305 mm) above the roof, except that if a roof is to be used for  
any purpose other than weather protection, then the vent extensions shall be run not less  
than 7 feet (2134 mm) above the roof.  
History: 1998-2000 AACS; 2013 AACS.  
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.  
History: 2023 MR 22, Eff. Mar. 12, 2024.  
R 408.30754 Rescinded.  
History: 1954 ACS 81, Eff. May 19, 1975; 1954 ACS 91, Eff. June 16, 1977.  
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R 408.30754a Frost Closure.  
Rule 754a. Section 903.2 of the code is amended to read as follows:  
Section 903.2. Frost Closure. To prevent frost closure, every vent extension  
through a roof shall be a minimum of 3 inches (76 mm) in diameter. Any increase in the  
size of the vent shall be made inside the building a minimum of 1 foot (305 mm) below  
the roof or inside the wall.  
History: 1992 AACS; 1998-2000 AACS; 2013 AACS.  
R 408.30754b Extensions outside a structure.  
Rule 754b. Section 903.7 of the code is amended to read as follows:  
903.7. Extensions outside a structure. Vent pipes installed on the exterior of the  
structure shall be protected against freezing by insulation or heat, or both.  
History: 1998-2000 AACS; 2001 AACS; 2013 AACS.  
R 408.30754c Rescinded.  
History: 1998-2000 AACS; 2001 AACS.  
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  
MATERIAL  
STANDARD  
Acrylonitrile butadiene styrene (ABS)  
ASTM D2661; ASTM F628; ASTM  
plastic pipe in IPS diameters, including F1488; CSA B181.1; CSA B182.1  
Schedule 40, DR 22 (PS 200) and DR 24  
(PS 140); with a solid, cellular core or  
composite wall.  
Cast-iron pipe  
Concrete pipe  
ASTM A74; ASTM A888; CISPI 301  
ASTM C14; ASTM C76; CSA  
A257.1M; CSA A257.2M  
Copper or copper-alloy tubing (Type K,  
L, M or DWV)  
ASTM B75; ASTM B88; ASTM B251;  
ASTM B306  
Polyethylene (PE) plastic pipe  
ASTM F667; ASTM F2306/F2306;  
ASTM F2648/F2648M  
Polypropylene (PP) plastic pipe  
ASTM F2736; ASTM F2764; CSA  
B182.13  
Polyvinyl chloride (PVC) plastic pipe  
ASTM D2665; ASTM D3034; ASTM  
(Type DWV, SDR26, SDR35, SDR41, F891; ASTM F1488; CSA B181.2; CSA  
PS50 or PS100) in IPS diameters, B182.2; CSA B182.4  
including Schedule 40, DR 22 (PS 200)  
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and DR 24 (PS 140); with a solid, cellular  
core or composite wall  
Vitrified clay pipe  
Stainless steel drainage systems, Type  
316L  
ASTM C4; ASTM C700  
ASME A112.3.1  
History: 1979 AC; 1982 AACS; 1997 AACS; 2021 AACS; 2023 MR 22, Eff. Mar. 12, 2024.  
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.  
2023 MR 22, Eff. Mar. 12, 2024.  
R 408.30756 Rescinded.  
History: 1989 AACS; 1998-2000 AACS.  
R 408.30756a Rescinded.  
History: 1989 AACS; 1998-2000 AACS.  
R 408.30757 Horizontal drains within building and building sewers.  
Rule 757. Sections 708.3, 708.3.4, and 708.3.5 of the code are being added to read  
as follows:  
708.3 Where required. Cleanouts shall be located in accordance with sections  
708.3.1, 708.3.3 to 708.3.5.  
708.3.1. Horizontal drains within building and building sewers. All horizontal drains  
within buildings and building sewers shall be provided with cleanouts located not more  
than 100 feet (30 480 mm) apart.  
For underground piping that is more than 10 inches in diameter, manholes shall be  
provided and located at every major change of direction, grade, elevation, or size of pipe  
or at intervals of not more than 400 feet (12 1920 mm). Metal covers shall be provided  
for the manholes and shall be of sufficient weight to meet local traffic and loading  
conditions.  
Within buildings, manhole covers shall be gastight and the manhole shall be vented  
with not less than a 4- inch (102 mm) pipe.  
708.3.3. Changes of direction. Cleanouts shall be installed at each change of  
direction greater than 45 degrees (0.79 rad) in the building sewer, building drain and  
horizontal waste or soil lines. Where more than one change of direction occurs in a run of  
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piping, only one cleanout shall be required for each 40 feet (12 192 mm) of developed  
length of the drainage piping.  
708.3.4. Base of stack. A cleanout shall be provided at the base of each waste or  
soil stack.  
708.3.5. Building drain and building sewer junction. There shall be a cleanout near  
the junction of the building drain and the building sewer. The cleanout shall be either  
inside or outside the building wall and shall be brought up to the finished ground level or  
to the basement floor level. An approved two-way cleanout is allowed to be used at this  
location to serve as a required cleanout for both the building drain and building sewer.  
The cleanout at the junction of the building drain and building sewer shall not be required  
if the cleanout on a 3 – inch (76mm) or larger diameter soil stack is located within a  
developed length of 10 feet (3048 mm) of the building drain and building sewer  
connection. The minimum size of the cleanout at the junction of the building drain and  
building sewer shall comply with Section 708.7.  
History: 1979 AC; 1998-2000 AACS; 2001 AACS; 2013 AACS; 2017 AACS; 2021 AACS.  
R 408.30757a Discharge pipe and fittings.  
Rule 757a. Section 712.3.3 of the code is added to read as follows:  
712.3.3. Discharge pipe and fittings. Discharge piping and fittings shall be  
constructed of approved materials.  
History: 2013 AACS.  
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.  
3. Toilet facilities for public swimming pools shall be provided in accordance with  
R 325.2111 to R 325.2199.  
4. Toilet facilities for childcare center, day care center, and nursery school facilities  
shall be provided in accordance with R 400.8101 to R 400.8840.  
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5. Toilet facilities for children’s camps shall be provided in accordance with R  
400.11101 to R 400.11413.  
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  
requirements of the Michigan building code. The public shall have access to the required  
toilet facilities at all times that the building is occupied.  
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TABLE 403.1  
MINIMUM NUMBER OF REQUIRED PLUMBING FIXTURESa  
(See Sections 403.1.1 and 403.2)  
DRINKI  
FOUNT  
WATER CLOSETS  
(URINALS SEE  
SECTION 419.2)  
NG  
LAVATORIES  
AIN e,f (SEE  
BATHTU  
SHOWER  
SECTIO  
N
N
1
CLASSIFICATI  
OCCUPAN  
DESCRIPTI  
Theaters and  
FEMA  
M
ALE  
FEM  
ALE  
BS/  
S
MALE  
LE  
OTHER  
O.  
ON  
CY  
ON  
410.1)  
other buildings  
for the  
performing arts  
and motion  
1 per  
1 per  
1 per  
1 per  
1
A-1d  
1 per 200  
1 per 500  
125  
65  
service sink  
pictures  
Nightclubs,  
bars, taverns,  
dance halls, and  
buildings for  
similar purposes  
Restaurants,  
banquet halls and  
food courts  
1
1 per 75  
1 per 500  
1 per 500  
40  
75  
40  
75  
service sink  
Assembly  
1 per  
1 per  
1 per  
1 per  
1 per 200  
1
service sink  
A-2d  
100 for the 50 for the  
1 per 250 for the  
first 750 and 1 per  
500 for the  
remainder  
exceeding 750  
first 400  
first 400  
and 1 per  
and 1 per  
1 per  
1,000  
_____  
250 for the 150 for the  
remainder  
exceeding  
400  
remainder  
exceeding  
400  
Casino  
1
gaming areas  
service sink  
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Auditoriums  
without  
permanent  
seating, art  
galleries,  
1 per  
1 per  
1 per  
1 per  
1
1 per 200  
1 per 500  
exhibition halls,  
museums, lecture  
halls, libraries,  
arcades, and  
gymnasiums  
Passenger  
terminals and  
transportation  
facilities  
125  
65  
service sink  
A-3d  
1 per  
1,000  
1
1 per 750  
1 per 200  
500  
150  
500  
75  
service sink  
Places of  
worship and  
other religious  
services.  
1 per  
1 per  
75 for the  
first 1,500  
and 1 per  
1 per  
1 per  
40 for the  
first 1,520  
and 1 per  
1 per  
1,000  
1
service sink  
Coliseums,  
arenas, skating  
rinks, pools, and  
tennis courts for  
indoor sporting  
events and  
1
1 per  
1 per  
1,000  
1
A-4  
A-5  
per  
200  
120 for the 60 for the  
150  
150  
service sink  
remainder  
exceeding  
1,500  
remainder  
exceeding  
1,520  
activities  
1 per  
1 per  
Stadiums,  
amusement  
parks, bleachers,  
and grandstands  
for outdoor  
75 for the  
first 1,500  
and 1 per  
40 for the  
first 1,520  
and 1 per  
1
1 per  
1 per  
1,000  
1
per  
200  
120 for the 120 for the  
service sink  
remainder  
exceeding  
1,500  
remainder  
exceeding  
1,520  
sporting events  
and activities  
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