MN Plumber
Minnesota Plumber Licensing Exam
More study resources
Cheat sheet
Keep the key ideas within reach.
ExploreKey terms
Get comfortable with the vocabulary.
ExploreStudy plan
Give each week a clear focus.
ExploreCommon mistakes
Understand the traps and how to avoid them.
ExploreCase studies
Put your knowledge to work in context.
ExploreExam-day guide
Prepare for the day ahead.
ExploreAbout this exam
The Minnesota plumber licensing exam is the state's credentialing test for individuals seeking to work as journeyman or master plumbers. It is designed for plumbing professionals who have completed the required apprenticeship or work experience and want to demonstrate their knowledge of the Minnesota Plumbing Code and safe installation practices. The exam covers a broad range of topics, including general regulations, plumbing system design, fixtures, water supply and distribution, sanitary drainage and venting, storm drainage, traps and interceptors, fuel gas piping, backflow prevention, and plan reading. Preparation should focus on the Minnesota Plumbing Code, as the exam is code-based and tests your ability to apply code provisions to real-world scenarios. A thorough review of the code, combined with practice questions and hands-on experience, is essential. Many candidates find it helpful to study in the order of the code chapters and to focus on the areas with the highest exam weight, such as sanitary drainage and venting. The exam is multiple-choice and aims to assess both theoretical knowledge and practical judgment. For current information on scheduling, fees, and passing scores, candidates should consult the official licensing body's website, as these details are subject to change and are not covered here. This page provides an independent overview and does not claim any official affiliation with the State of Minnesota.
What you'll study
About MN Plumber preparation
What is the format of the Minnesota plumber licensing exam?
The exam is multiple-choice. The number of questions and time limit are set by the official licensing body and can change; check the official website for the current format.
How difficult is the Minnesota plumber exam?
The exam is challenging because it requires applying code provisions to practical scenarios. Many candidates find the sanitary drainage and venting sections most difficult. Thorough code study and field experience improve your chances.
Can I retake the exam if I fail?
Retake policies are set by the state licensing body. Typically, there is a waiting period and an additional fee. Contact the official board for the current retake policy.
How long is the exam?
The time limit is determined by the official licensing body and may vary. It is not stated here because it can change. Visit the official website for the current time allowance.
What is the passing score?
The passing score is established by the state licensing authority and is subject to change. The official body publishes the current passing standard; check their website for details.
What topics should I study first?
Start with the chapters that carry the most weight, such as sanitary drainage and venting, water supply, and fuel gas piping. Then cover fixtures, storm drainage, and regulations. Review the entire code at least once.
What are common mistakes candidates make?
Common mistakes include underestimating the exam's code-based nature, not studying the Minnesota-specific amendments, and failing to practice applying code sections to scenarios. Many also neglect math and plan-reading practice.
How much does the exam cost?
Fees are set by the state and can change. The official licensing body publishes the current fee schedule on its website. This page does not list fees to avoid outdated information.
Is the exam based on the Minnesota Plumbing Code?
Yes, the exam tests knowledge of the Minnesota Plumbing Code and related regulations. It is important to study the current edition of the code and any state amendments.
How should I prepare for the exam?
Use the Minnesota Plumbing Code as your primary reference. Supplement with practice questions, flashcards, and hands-on experience. Consider a prep course focused on the Minnesota code. Study regularly over several weeks.