DEPARTMENT OF LICENSING AND REGULATORY AFFAIRS  
BUREAU OF CONSTRUCTION CODES  
STATE PLUMBING BOARD  
LICENSES  
(By authority conferred on the state plumbing board by section 13 of 2002 PA 733, MCL  
338.3523, and Executive Reorganization Order Nos. 1996-2, 2003-1, 2008-4 and 2011-4,  
MCL 445.2001, MCL 445.2011, MCL 445.2025 and MCL 445.2030)  
R 338.921 Examination; qualifications.  
Rule 1. Any person who is 18 years of age or over and who possesses the necessary  
qualifications may apply for examination for a journey plumber’s license. Any person  
who is 18 years of age or over, who possesses the necessary qualifications, and who can  
read and write English may apply for examination for a master plumber’s license.  
History: 1954 AC; 1979 AC; 1985 AACS; 2014 AACS.  
R 338.921a Definitions.  
Rule 1a. The terms defined in the state plumbing act, 2002 PA 733, MCL 338.3511 to  
338.3569, have the same meaning when used in these rules.  
History: 2014 AACS.  
R 338.922 Application for journey plumber, master plumber, and plumbing  
contractor examinations.  
Rule 2. Application for examination for a journey plumber’s license, a master  
plumber’s license, or a plumbing contractor’s license shall be made with a proper  
application which shall be furnished by the department. The application for examination  
shall be made to the department and shall be accompanied with the fee prescribed in the  
state plumbing act.  
History: 1954 AC; 1979 AC; 1985 AACS; 2014 AACS.  
R 338.923 Qualification of applicants for journey plumber’s examination.  
Rule 3. (1) To qualify for examination for a journey plumber’s license, an applicant  
shall furnish, either on or with his or her application, a notarized statement from his or  
her present or former employers and master plumber to the effect that he or she has at  
least 6,000 hours of experience gained over a period of not less than 3 years as a  
registered apprentice in the practical installation of plumbing under the supervision of a  
master plumber.  
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(2) When evidence is produced to the effect that an applicant is a graduate of a  
recognized trade school, proper credit will be given the applicant, but such credit shall  
not exceed 2,000 hours of the required 6,000 hours of practical experience as a registered  
apprentice.  
(3) If an applicant is unable to conform to any of the requirements in subrules (1) and  
(2) of this rule, he or she may, upon written request, appear before a quorum of the state  
plumbing board to present evidence as to his or her eligibility for examination.  
(4) A person who is licensed as a journey plumber in another state or country shall  
appear before a quorum of the state plumbing board to present evidence as to his or her  
possession of a journey plumber license and the licensing requirements from the licensing  
state or country. The state plumbing board shall then determine if the individual will be  
allowed to take the Michigan journey plumber examination.  
History: 1954 AC; 1979 AC; 1985 AACS; 2014 AACS.  
R 338.924 Qualifications of applicants for master plumber’s examination.  
Rule 4. (1) To qualify for examination for a master plumber’s license, an applicant  
shall be on record with the department as having gained 4,000 hours of experience as a  
licensed journey plumber over a period of not less than 2 years immediately preceding  
the date of his or her application.  
(2) If an applicant is unable to conform to the requirements of subrule (1) of this rule,  
he or she may, upon written request, appear before a quorum of the state plumbing board  
to present evidence as to his or her eligibility for examination.  
(3) A person who is licensed as a master plumber or equivalent in another state or  
country shall appear before a quorum of the state plumbing board to present evidence as  
to his or her possession of a master plumber license or equivalent and licensing  
requirements from the licensing state or country. The state plumbing board shall then  
determine if the individual will be allowed to take the Michigan master plumber  
examination.  
History: 1954 AC; 1979 AC; 1985 AACS; 2014 AACS.  
R 338.924a Qualification of applicants for plumbing contractor examination.  
Rule 4a. (1) To qualify for examination for a plumbing contractor license, the applicant  
shall provide his or her residence address, business address, or employment information  
for the past 5 years, and conviction history information on a form provided by the  
department with the appropriate nonrefundable examination fee.  
History: 2014 AACS.  
R 338.924b Contractors proof of ownership.  
Rule 4b. (1) To qualify for licensure as a plumbing contractor, an applicant shall  
provide the address of the principal place of business and proof that he or she is an owner  
or officer of the business.  
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(2) An applicant shall furnish documentation as determined acceptable by the  
department to verify the applicant’s current business structure. Documentation includes,  
but are not limited to, the following:  
(a) For an application for a sole proprietor using an assumed name, a copy of the  
current filed certificate of persons conducting business under an assumed name issued by  
the county clerk or a notarized letter stating the applicant is a sole proprietor with the  
exact business name.  
(b) For an application for a partnership, a copy of the current filed certificate of limited  
partnership issued by the department or a copy of the current filed certificate of general  
partnership issued by the county clerk.  
(c) For an application for a limited liability company, a copy of the filed articles of  
organization, certificate of assumed name, if applicable, and current notarized operating  
agreement signed by each officer.  
(d) For an application for a corporation, a copy of the filed articles of incorporation,  
certificate of assumed name, if applicable, and current certificate of good standing.  
(e) For a foreign company, a copy of the registration to transact business in this state.  
(3) An applicant shall provide any other documentation requested by the department to  
determine the applicant’s business structure and current authorization to do business in  
this state.  
History: 2014 AACS.  
R 338.925 Investigation of applicants.  
Rule 5. (1) The character, experience, and fitness of the applicants shall also be taken  
into consideration. The board and department may investigate any applicant, or  
application filed, and approve or disapprove the same.  
(2) Upon the acceptance, or rejection, of an application the department shall  
immediately notify the applicant at the address given in the application. If an application  
is rejected, the examination fee shall not be refunded.  
History: 1954 AC; 1979 AC; 2014 AACS.  
R 338.926 Code update courses; instructors’ standards.  
Rule 6. (1) The board shall approve the instructor-provided code update course that is  
in compliance with the requirements of the act and these rules.  
(2) The course for master and journey licensees shall be of sufficient contact hours to  
address the design items established by the board in consideration of the number of code  
item changes or updates.  
(3) A certificate of completion shall be issued by a course provider to a person who has  
successfully completed the code update class by required attendance. The certificate  
shall contain all of the following information:  
(a) A course approval number granted by the department.  
(b) The name and address of the person, school, organization, or company who  
sponsors or administers the course.  
(c) The date the certificate was issued.  
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(d) The student’s name and address.  
(e) The instructor’s signature certifying that the applicant completed the course as  
described in subrule (2) of this rule.  
History: 1954 AC; 1979 AC; 1985 AACS; 2014 AACS.  
R 338.927 Submission process and approval of code update course and instructor.  
Rule 7. (1) A provider of a code update course shall apply for approval by submitting  
information on an application provided by the department.  
(2) An application shall contain all of the following information:  
(a) The name and address of the applicant.  
(b) The name of the instructor and his or her license number where applicable.  
(c) A copy of the items established by the board from the department’s program outline.  
(3) Approval of the course shall be provided by the department through its licensing  
software system.  
(4) The department may withdraw the approval of a course if the approval was issued in  
error, if the approval was issued on the basis of incorrect information, or if the course is  
found to be in violation of these rules. Notice of withdrawal of approval shall be in  
writing and shall state the reason for the withdrawal of approval. An appeal of the  
withdrawal shall be processed pursuant to the provision of the administrative procedures  
act, 1969 PA 306, MCL 24.201 to 24.328.  
History: 1954 AC; 1979 AC; 1985 AACS; 2014 AACS.  
R 338.928 Notice of examination.  
Rule 8. Notice of the date, time, and place of examination shall be provided by the  
department. This notice shall instruct the applicant as to the tools and materials which  
the applicant is required to furnish. It shall also include an admission notice which shall  
be presented to the examiners, by the applicant, at the time and place of the scheduled  
examination designated in the admission notice. The applicant shall present current  
picture identification, such as a driver’s license, to the examiners at the time of the  
examination.  
History: 1954 AC; 1979 AC; 1985 AACS; 2014 AACS.  
R 338.929 Failure to appear for examination.  
Rule 9. If an applicant fails to appear for the examination designated in the admission  
notice and fails to make a satisfactory explanation for his or her absence to the  
department within 10 calendar days following the scheduled examination, his or her  
application shall be cancelled and the examination fee forfeited.  
History: 1954 AC; 1979 AC; 1985 AACS; 2014 AACS.  
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R 338.930 Scope of examination.  
Rule 10. (1) The examinations of all applicants for licenses shall be conducted by the  
department and state plumbing board.  
(2) The examination of an applicant for the plumbing contractor license shall consist of  
oral and written tests, but not be limited to questions designed to test an individual’s  
knowledge of the state plumbing act, 2002 PA 733, MCL 338.3511 to 338.3569, the  
Stille-DeRossett-Hale single state construction code act, 1972 PA 230, MCL 125.1501 to  
125.1531, and the administration and enforcement requirements of the Michigan  
plumbing code.  
(3) The examination of an applicant for the master plumber’s license shall consist of  
oral, written, and practical tests, as well as the interpretation of charts, material takeoffs,  
and blueprints. The written test shall cover the general theory and practice of plumbing,  
knowledge of the Michigan plumbing code, knowledge of the state’s laws governing  
plumbers and plumbing, and other matters pertaining to the best interests of the general  
public through the practice of plumbing. The practical test shall cover an applicant’s  
ability to perform the mechanical work connected with the plumbing trade as the board  
considers necessary.  
(4) The examination of an applicant for the journey plumber’s license shall consist of  
oral, written, and practical tests. The written test shall cover the general theory and  
practice of plumbing, knowledge of the Michigan plumbing code, state’s laws governing  
plumbers and plumbing, and other matters pertaining to the best interests of the general  
public through the practice of plumbing. The practical test shall cover an applicant’s  
ability to perform the mechanical work connected with the plumbing trade as the board  
considers necessary, such as the interpretation of charts and piping projects.  
(5) To qualify for a license, an applicant shall be required to receive a minimum grade  
of 70% in each part of the examination. Failure to achieve a minimum grade of 70% on  
each part of the examination shall result in an applicant having to retake the entire  
examination.  
History: 1954 AC; 1979 AC; 1985 AACS; 2014 AACS.  
R 338.931 Reexamination.  
Rule 11. If an applicant for a contractor, master, or journey plumber’s license does not  
receive a passing grade, his or her application shall be cancelled and fees forfeited. An  
applicant who fails to pass his or her examination for a license as a plumbing contractor,  
master plumber, or journey plumber may apply for reexamination.  
History: 1954 AC; 1979 AC; 1985 AACS; 2014 AACS.  
R 338.931a License expiration.  
Rule 11a. A journey plumber license, apprentice registration, and plumbing affidavit  
shall expire on April 30 each year. A plumbing contractor license and a master plumber  
license shall expire on a 3-year-cycle on April 30.  
History: 2014 AACS.  
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R 338.931b Complaint timeline.  
Rule 11b. (1) A complaint filed under the state plumbing act must be received by the  
department within 18 months of the date the plumbing work was performed or contracted  
to be performed.  
(2) A complaint shall be submitted in writing on a form specified by the department.  
(3) The department may dismiss a complaint on its own motion if it determines that the  
complaint has been resolved, settled, is without merit, or that there is insufficient  
evidence of a violation of the act.  
History: 2014 AACS.  
R 338.932 Rescission.  
Rule 12. The rules entitled "Rules Governing Examinations--Competency of  
Plumbers," appearing on pages 498 and 499 of the 1944 Michigan  
Administrative Code, are rescinded.  
History: 1954 AC; 1979 AC.  
Editor's note: The code referred to in this rule is the Michigan  
Administrative Code of 1944  
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