Minnesota Journeyworker Plumber • DLI • 240 Points • 330 Minutes • 70% Passing • 2020 Minnesota Plumbing Code
Ready to become a licensed plumber in Minnesota? This Minnesota Journeyman Plumber Contractor Exam Prep guide explains the Journeyworker Plumber licensing requirements, the official state examination, Minnesota Plumbing Code topics, plumbing mathematics, drainage and venting, study books, and exam preparation resources available from Contractor Exam Preps.
Minnesota officially uses the title Journeyworker Plumber.
Many people still search for the term Journeyman Plumber, so this guide uses both names while following the terminology used by the state.
The Minnesota Department of Labor and Industry, commonly known as DLI, administers the state's personal plumbing licensing program.
Journeyworker Plumbers are skilled tradespeople who install, alter, repair, and maintain plumbing systems within the scope permitted by Minnesota law.
Those systems supply safe water and remove wastewater from buildings.
They also include plumbing fixtures, traps, vents, building drains, building sewers, water heaters, valves, and other important parts of a building.
When plumbing works properly, nobody gives it much thought.
When it stops working, suddenly the whole building has an opinion!
That is one reason plumbers must understand both practical installation work and plumbing code requirements.
To qualify through the standard Minnesota registered-unlicensed-plumber pathway, applicants need four years of practical plumbing experience.
That equals at least 7,000 hours of qualifying work.
Minnesota defines one year of qualifying practical experience as at least 1,750 hours.
No more than 1,750 hours can be credited during a single calendar year.
The required experience must cover several important plumbing systems.
Registered unlicensed plumbers must document at least 2,000 hours installing water distribution systems.
They must also document at least 2,000 hours installing drain, waste, and vent systems.
Another 1,000 hours must involve plumbing fixture installation.
The remaining 2,000 hours can come from other qualifying plumbing activities recognized by Minnesota DLI.
These requirements help make sure applicants have experience in different parts of the plumbing trade.
Someone who has spent years working with one type of pipe should still understand the other systems found throughout buildings.
There are also other qualifying routes.
Applicants may qualify by completing a DLI-registered plumbing apprenticeship program.
Some individuals with restricted Minnesota plumbing licenses can qualify through a separate experience pathway.
Plumbers licensed in another state may also be eligible for examination based on their licensing and experience history.
Each pathway has its own conditions, so applicants should review the official Minnesota Plumbing License Experience Requirements.
The Minnesota Journeyworker Plumber examination is administered directly by DLI.
It is not a PSI, Pearson VUE, or PROV examination.
The official DLI Plumbing License Examination Guide describes the test as a 240-point examination.
This is an important detail.
The guide does not say that the exam contains 240 questions.
Therefore, 240 points should not be described as 240 individual questions.
Candidates are allowed 5½ hours, or 330 minutes, to complete the examination.
The passing score is 70%.
That equals 168 points out of 240.
The examination contains questions that require knowledge of plumbing systems, code requirements, mathematics, and practical installation practices.
Some questions may involve a single code rule.
Others may require more than one step or several different requirements.
The state examination is open reference, but candidates must follow a special rule.
Minnesota DLI provides the approved reference materials and calculator.
Applicants cannot bring a personally tabbed plumbing codebook, commercial study guide, notes, or other unauthorized materials into the examination building.
The department-provided plumbing codebook has no tabs or additional navigation aids.
As a result, students should learn how to use the code's chapters, definitions, tables, headings, and index efficiently.
The official exam guide identifies the 2020 Minnesota Plumbing Code, Minnesota Rules Chapter 4714, as the examination code reference.
This Minnesota code incorporates provisions from the 2018 Uniform Plumbing Code, along with Minnesota-specific amendments.
The Minnesota Plumbing Board reports that this code became effective December 17, 2021.
As of this guide's update, it remains the currently published Minnesota Plumbing Code.
Students should not assume that the International Plumbing Code and Uniform Plumbing Code are interchangeable.
The IPC and UPC are different model codes.
They can use different section structures, tables, requirements, and permitted installation methods.
Contractor Exam Preps offers a Journeyman Plumber Exam Study Guide Based on the 2021 Uniform Plumbing Code.
The guide contains 990 practice questions with answer keys and covers plumbing calculations, isometric drawings, water distribution, drainage, venting, and other plumbing topics.
This book follows the same UPC family of plumbing codes used by Minnesota.
However, it is based on the 2021 UPC, not the state's adopted 2018 UPC-based code with Minnesota amendments.
That means the guide is useful for supplemental study, but it does not replace the official Minnesota Plumbing Code.
Contractor Exam Preps also offers the Journeyman Plumber Test Success Online Course Based on the 2021 UPC.
The course provides video lessons, plumbing system review, isometric drawing practice, and simulated examination exercises.
Online instruction can be useful for applicants who work full time and need a flexible study schedule.
For candidates preparing for a related Minneapolis local credential, the store carries the Minneapolis Journeyman Plumber with Gas ICC 498 Exam Book Package.
That package includes the 2020 Minnesota Plumbing Code and a Minnesota Mechanical and Fuel Gas Code reference.
However, it is intended for the separate Minneapolis ICC Plumber with Gas examination.
The Minneapolis ICC 498 exam is not the same as the statewide Minnesota DLI Journeyworker Plumber examination.
The Minneapolis exam includes 100 questions, a three-hour time limit, and gas-related topics.
Minnesota's statewide Journeyworker examination is a 240-point, five-and-a-half-hour DLI examination.
Applicants should always confirm which credential they actually need before purchasing study materials.
The most important study subject for the statewide exam is familiarity with Minnesota's Plumbing Code requirements.
Begin with basic plumbing principles and general regulations.
Understand the purpose of plumbing systems, code compliance, pipe materials, approved fittings, installation practices, and inspection requirements.
Then review water supply and distribution.
Water supply systems deliver potable water to plumbing fixtures and equipment.
Questions may involve water services, distribution piping, pipe sizing, pressure, fixture demand, valves, and backflow protection.
Backflow prevention is especially important because it protects drinking water from contamination.
Students should understand cross-connections, air gaps, backflow devices, and the conditions that require protection.
Next, study sanitary drainage.
Drainage systems carry wastewater away from plumbing fixtures and toward the building sewer or other approved disposal point.
Pipe size, slope, fittings, cleanouts, and system design all affect drainage performance.
Plumbing vent systems help protect trap seals and support proper drainage operation.
Venting arrangements can become complicated when several fixtures connect to the same drainage system.
That is why applicants should practice reading plumbing isometric drawings.
Isometric diagrams show piping relationships in a three-dimensional style.
They can help students identify horizontal branches, vertical stacks, fixtures, vents, and changes in direction.
Plumbing calculations are another major preparation area.
Candidates should practice developed pipe lengths, fixture-unit totals, drainage sizing, water demand, and storm drainage calculations.
The official DLI guide includes examples involving water distribution, drain-waste-vent piping, and storm sewer sizing.
Water heaters are also included in the state's knowledge areas.
Study temperature and pressure relief devices, installation clearances, water heater connections, and other safety requirements.
Plumbing fixtures deserve dedicated study time.
Review sinks, toilets, lavatories, showers, bathtubs, floor drains, and related fittings.
Know that different fixtures may have different requirements for supply connections, drainage, protection, or installation.
Traps, interceptors, and separators should not be overlooked.
These components have important functions in plumbing systems, including trap seal protection and the separation of certain materials from wastewater.
Storm drainage involves roof drains, leaders, storm piping, drainage areas, and water flow.
Minnesota candidates should also understand system testing and inspection requirements.
Before concealed plumbing work is accepted, inspectors may need to verify that the installation complies with applicable code provisions.
The state's license also comes with continuing responsibilities.
Journeyworker Plumber licenses expire on December 31 of odd-numbered years.
Renewal generally requires 16 hours of DLI-approved continuing education during each two-year license period.
At least eight hours must relate to the Minnesota State Plumbing Code.
The remaining hours may involve the Plumbing Code, plumbing-related technical topics, building code requirements, or applicable plumbing laws.
The license can also serve as a stepping stone toward becoming a Minnesota Master Plumber.
Under the standard advancement pathway, a licensed Journeyworker Plumber must gain at least one year of practical plumbing experience before qualifying for the Master Plumber examination.
Master Plumber licensing is important for applicants who eventually want to operate or qualify a plumbing contracting business.
In Minnesota, plumbing contractors generally must designate a responsible licensed individual who holds an active Master Plumber license.
A personal Journeyworker Plumber license and a Plumbing Contractor business license are separate credentials.
This guide includes the statewide licensing pathway, official exam information, Minnesota plumbing code subjects, plumbing diagrams, study strategies, Contractor Exam Preps products, a six-week study plan, interactive FAQs, a store-hosted plumbing study image, and a related 1ExamPrep YouTube video.
Important Minnesota Journeyworker Plumber 2026 Update: Minnesota DLI administers the statewide Journeyworker Plumber licensing examination. The officially published format is 240 points, 330 minutes, and 70% passing. Candidates must earn at least 168 points. The DLI guide does not publish a total count of 240 individual questions. The tested plumbing reference is the 2020 Minnesota Plumbing Code, based on the 2018 Uniform Plumbing Code with Minnesota amendments. DLI supplies the plumbing code, laws and rules reference, and calculator during the examination. Personal books and study guides are prohibited. The standard qualification pathway requires four years and 7,000 hours of plumbing experience, including specified water distribution, drainage and venting, and fixture-installation experience. The Minneapolis ICC Journeyman Plumber with Gas credential is a different local examination.
A Minnesota Journeyworker Plumber is a state-licensed plumbing professional who has demonstrated qualifying experience and passed the applicable licensing examination.
Journeyworker Plumbers work with plumbing piping, fixtures, drains, vents, water heaters, valves, and plumbing equipment.
Their work helps protect drinking water, safely remove wastewater, and maintain healthy building conditions.
A Journeyworker Plumber must understand both the practical installation process and the requirements of the Minnesota Plumbing Code.
For example, installing a sink requires more than connecting two pipes.
The plumber must consider the water supply, fixture connections, trap, vent, drainage slope, and applicable installation rules.
When several fixtures connect to one system, the plumber must also understand piping sizes, fixture units, and venting relationships.
Licensed plumbers may supervise registered unlicensed plumbers under applicable Minnesota employment and supervision requirements.
However, a Journeyworker Plumber is not the same as a Minnesota Master Plumber.
Master Plumbers have additional licensing qualifications and may serve as responsible licensed individuals for plumbing contractors.
Plumbing Contractor is also a separate business license.
Official credential: Journeyworker Plumber.
Licensing authority: Minnesota DLI.
Standard practical experience: Four years, 7,000 hours.
Official examination: 240 points in 5½ hours.
Passing standard: 70%, or 168 points.
Code reference: 2020 Minnesota Plumbing Code.
| Step | Requirement | What to Prepare |
|---|---|---|
| Credential | Journeyworker Plumber | Confirm the statewide Minnesota classification. |
| Authority | Minnesota DLI | Use current state plumbing licensing information. |
| Exam Administrator | Minnesota DLI | Apply directly through the state process. |
| Standard Experience | Four Years | Maintain qualifying experience records. |
| Minimum Hours | 7,000 | Complete documented plumbing work. |
| Creditable Hours Per Year | Maximum 1,750 | Track annual experience accurately. |
| Water Distribution | 2,000 Hours | Record potable water piping installation work. |
| Drain, Waste and Vent | 2,000 Hours | Record qualifying DWV installation. |
| Plumbing Fixtures | 1,000 Hours | Document fixture installation experience. |
| Other Qualifying Work | Remaining 2,000 Hours | Verify work falls within acceptable plumbing activities. |
| Experience Certification | Licensed Master Plumber | Obtain the necessary experience verification. |
| Apprenticeship Alternative | DLI-Registered Program | Provide approved program completion records. |
| Restricted License Path | Additional Qualifying Experience | Check the separate state eligibility conditions. |
| Out-of-State Qualification | State Review | Provide license and qualifying work documentation. |
| Exam Application | Submit to DLI | Apply online using current state instructions. |
| Exam Application Fee | $50 | Confirm current fee when applying. |
| Approval | Required Before Scheduling | Wait for the state approval notice. |
| Scheduling | DLI iMS | Choose an available examination appointment. |
| Walk-In Testing | Not Permitted | Schedule in advance. |
| Exam Format | 240 Points | Prepare for the state scoring system. |
| Published Question Count | Not Specified | Do not confuse total points with questions. |
| Exam Time | 330 Minutes | Practice extended examination sessions. |
| Passing Score | 70% | Earn 168 or more points. |
| Exam Code | 2020 Minnesota Plumbing Code | Study Minnesota Rules Chapter 4714. |
| Model Code Basis | 2018 UPC With Minnesota Amendments | Learn Minnesota-specific changes. |
| Exam References | DLI Provided | Do not bring personal study materials. |
| Calculator | DLI Provided | Practice with a basic calculator. |
| Exam Results | Per DLI Notification | Follow current department instructions. |
| Retake Policy | Minimum 30-Day Wait | Reapply after the required waiting period. |
| License Renewal | Odd-Numbered Years | Renew by December 31. |
| Continuing Education | 16 Hours | Include eight hours related to the State Plumbing Code. |
| Master Plumber Advancement | Separate Qualification | Gain at least one year as a licensed Journeyworker. |
| Plumbing Contractor Business | Separate License | Review responsible Master Plumber requirements. |
The following information summarizes the official DLI Plumbing License Examination Guide and current Minnesota state licensing pages.
| Exam Detail | Category | Published Information |
|---|---|---|
| State | Licensing | Minnesota |
| Official License | Licensing | Journeyworker Plumber |
| Exam Abbreviation | Licensing | JP |
| State Authority | Government | Minnesota DLI |
| Exam Provider | Testing | Minnesota Department of Labor and Industry |
| PSI Exam | Testing | No |
| ICC 498 Exam | Testing | Separate Minneapolis Credential |
| Official Exam Scoring | Testing | 240 Points |
| Published Question Count | Testing | Not Specified in DLI Guide |
| Time Allowed | Testing | 330 Minutes |
| Time in Hours | Testing | 5½ Hours |
| Passing Score | Testing | 70% |
| Minimum Points to Pass | Testing | 168 |
| Reference Format | Testing | Open Reference, DLI-Provided Materials |
| State Plumbing Code | Code | 2020 Minnesota Plumbing Code |
| Minnesota Rule | Code | Chapter 4714 |
| Model Code | Code | 2018 Uniform Plumbing Code |
| Minnesota Amendments | Code | Included |
| Code Effective Date | Code | December 17, 2021 |
| Codebook | Reference | Provided by DLI |
| Codebook Tabs | Reference | Not Provided |
| Laws and Rules | Reference | DLI-Provided Reference |
| Calculator | Reference | DLI Provided |
| Personal Codebooks | Reference | Not Permitted |
| Personal Study Guides | Reference | Not Permitted |
| Standard Experience | Eligibility | Four Years |
| Experience Hours | Eligibility | 7,000 Hours |
| Water Distribution Hours | Eligibility | 2,000 |
| DWV Hours | Eligibility | 2,000 |
| Fixture Installation Hours | Eligibility | 1,000 |
| Exam Fee | Licensing | $50 Published |
| State Scheduling | Testing | iMS After Approval |
| Exam Retake | Testing | At Least 30 Days After Failure |
| Licensing Renewal | Licensing | December 31 in Odd-Numbered Years |
| Continuing Education | Licensing | 16 Hours Each Two-Year Cycle |
| Plumbing Code CE | Licensing | At Least 8 Hours |
| Journeyworker Renewal Fee | Licensing | $53 Published |
| Statewide Subject Weights | Blueprint | Not Published as Percentages |
Exam: Minnesota Journeyworker Plumber.
Official points: 240.
Passing: 168 points, or 70%.
Time: 330 minutes.
Published total question count: Not specified.
Reference: 2020 Minnesota Plumbing Code.
The DLI Plumbing License Examination Guide includes a detailed knowledge-area table identifying subjects for the Journeyworker Plumber classification.
These subjects follow the Minnesota Plumbing Code and include plumbing fundamentals, installation requirements, system sizing, fixtures, and safety.
Study the purpose of plumbing systems, minimum code standards, approved methods, and the importance of protecting public health.
Review code applicability, pipe materials, installation practices, prohibited fittings, workmanship, testing, and general requirements.
Learn terms related to potable water, drainage, venting, traps, fixtures, backflow, developed length, and piping systems.
Study water services, piping sizes, water demand, pressure, supply valves, water meters, and fixture connections.
Review air gaps, vacuum breakers, backflow prevention devices, cross-connections, and methods for protecting potable water.
Study sanitary drains, building drains, branch piping, vent stacks, trap arms, cleanouts, slope, and pipe sizing.
Review toilets, sinks, lavatories, showers, bathtubs, drinking fountains, floor drains, and special fixtures.
Review water heater installation, temperature and pressure safety devices, connections, clearances, and approved equipment requirements.
Study trap seals, trap sizes, grease interceptors, special waste devices, and applications requiring separation of materials.
Review indirect waste arrangements, receptors, air gaps, special waste piping, and discharge conditions.
Practice roof drainage, storm-water sizing, drainage areas, leaders, conductors, and storm sewer calculations.
Review approved pipe materials, joining methods, pipe protection, support requirements, and prohibited installation practices.
Practice measurements, developed lengths, fixture units, pipe sizes, water demand, slopes, and storm drainage calculations.
Study plumbing diagrams that show vertical and horizontal piping, fixture connections, vents, and drainage relationships.
Review plumbing tests, inspection procedures, code compliance checks, and the responsibilities of licensed plumbers.
Learn the licensing rules for Journeyworker Plumbers, Master Plumbers, registered unlicensed plumbers, and plumbing contractors.
Official guide: DLI Plumbing License Examination Guide.
Knowledge areas: Plumbing Code topics, systems, calculations, and licensing laws.
Official category percentages: Not published.
Exam total: 240 points, not a published 240-question count.
Start with the official Minnesota DLI Plumbing License Examination Guide.
Review the examination format, approved references, sample questions, plumbing formulas, and detailed knowledge areas.
Next, study the 2020 Minnesota Plumbing Code.
Learn where definitions, general regulations, water supply requirements, sanitary drainage, venting, fixtures, and storm drainage provisions are located.
Do not rely only on memorizing section numbers.
The important skill is understanding the topic well enough to locate the correct rule and apply it to the question.
Begin with water distribution systems.
Review water supply piping, fixture demand, pipe sizing, pressure, valves, and cross-connection protection.
Practice reading code tables and determining which conditions affect the answer.
Then study drainage, waste, and venting.
Focus on fixture units, pipe sizes, cleanouts, slopes, trap arms, vent connections, and drainage layouts.
Plumbing diagrams can help make these subjects easier to understand.
Next, study plumbing fixtures.
Review toilets, lavatories, showers, sinks, floor drains, drinking fountains, and related connections.
Water heaters are another important topic.
Learn the purpose of temperature and pressure protection and how safe water heater installations are evaluated.
Set aside time for plumbing mathematics.
Practice developed lengths, dimensions, water demand, drainage fixture units, roof drainage areas, and storm sizing.
The official DLI guide includes examples involving water distribution, DWV, and storm drainage.
Review those examples and practice solving similar problems independently.
Use a basic calculator when studying because Minnesota provides a calculator during the examination.
Contractor Exam Preps offers the Journeyman Plumber Study Guide Based on the 2021 UPC with 990 practice questions and answer keys.
Its general UPC topics can help strengthen plumbing knowledge, but the code year is newer than the state's 2018 UPC-based code.
The Journeyman Plumber UPC Online Course provides additional instruction and practice.
Finish by completing timed study sessions that last several hours.
Review every missed question and make notes about the supporting Minnesota Plumbing Code provision.
State reference: 2020 Minnesota Plumbing Code.
Main priorities: Water supply, DWV, fixtures, backflow, plumbing math, and isometrics.
Study products: UPC-based supplemental books and online learning.
Final practice: Extended timed sessions lasting up to 330 minutes.
A Journeyworker Plumber should understand the relationship between water supply piping, plumbing fixtures, sanitary drainage, traps, and vents.
The simplified illustration below shows several important plumbing systems that candidates should recognize during exam preparation.
Educational diagram only. It does not represent a complete code-approved plumbing installation or approved pipe sizing.
Register as an unlicensed plumber when required or participate in an appropriate DLI-registered plumbing apprenticeship program.
Accumulate at least 7,000 hours of acceptable practical experience under the state's rules.
Document the water distribution, drain-waste-vent, and plumbing fixture installation hours.
Submit the required application, experience records, and examination fee.
Focus on the 2020 Minnesota Plumbing Code and its UPC-based requirements and Minnesota amendments.
Review water supply, DWV, fixture units, storm sizing, diagrams, and long-form code questions.
Earn at least 168 of 240 points within the 330-minute testing period.
Complete the license issuance process, maintain continuing education, and consider Master Plumber advancement.
DLI provides a detailed list of plumbing knowledge areas but does not assign official percentages to each subject.
The following percentages are recommended allocations of study time. They are not official examination question weights.
Suggested study total: 100%.
Official exam: 240 points.
Passing: 70%.
Important: Study allocations are recommendations, not official DLI blueprint percentages.
Use official Minnesota references to prepare for the statewide licensing examination.
Contractor Exam Preps books and courses can support general trade study, but should not be confused with the approved DLI examination references.
| Reference | Edition or Status | Purpose |
|---|---|---|
| Minnesota Plumbing Code | 2020 | Official state code, provided during examination. |
| Uniform Plumbing Code Model Basis | 2018 | Underlying model code incorporated into Minnesota's regulations. |
| Minnesota Rules Chapter 4714 | Current Applicable Rules | Minnesota plumbing code and state amendments. |
| Minnesota Plumbing Laws and Rules | Current Applicable Reference | DLI-provided state licensing and regulatory reference. |
| Calculator | DLI Provided | Plumbing mathematics and system sizing. |
| Journeyman Plumber UPC Study Guide | 2021 UPC Based | Supplemental trade review and 990 practice questions. |
| Journeyman Plumber UPC Online Course | 2021 UPC Based | Supplemental video learning, isometric diagrams, and simulations. |
| Minneapolis Plumber with Gas Exam Book Package | Separate Local ICC 498 | Minneapolis competency preparation, not the statewide DLI exam. |
| 2024 IPC-Based Minnesota Study Packages | Newer IPC Retail Materials | General plumbing review only; not the official Minnesota UPC-based examination code. |
| DLI Plumbing Examination Guide | Current Posted State Guide | Exam format, topics, sample calculations, and test procedures. |
Official Minnesota exam code: 2020 Minnesota Plumbing Code.
Model code foundation: 2018 UPC with Minnesota amendments.
Contractor Exam Preps UPC guide: 2021 edition, supplemental study.
IPC study packages: Not a replacement for Minnesota's official UPC-based code.
Exam room references: Supplied by DLI only.
The Minnesota Journeyworker Plumber exam is an open-reference examination, but it does not allow candidates to bring personalized plumbing codebooks.
DLI supplies the plumbing code reference, state laws and rules material, and calculator.
This means students should learn how to find the correct answer without depending on personal tabs and written notes.
Begin by learning the structure of the 2020 Minnesota Plumbing Code.
Practice identifying whether a problem concerns water supply, drainage, venting, fixtures, or another subject.
Then locate the controlling provision and read its conditions carefully.
Pay attention to words such as minimum, maximum, permitted, required, and prohibited.
Practice using the official code for plumbing mathematics.
Do not assume the newest IPC book follows the same numbering or requirements as Minnesota's UPC-based code.
A Minnesota Journeyworker Plumber is qualified to perform plumbing work within the scope permitted by state law.
That includes installing, altering, repairing, and maintaining plumbing systems while following the Minnesota Plumbing Code.
These systems include potable water piping, drainage systems, vent piping, building drains, building sewers, fixtures, traps, valves, water heaters, and related equipment.
Journeyworker Plumbers may also supervise registered unlicensed plumbers under applicable state requirements.
However, the Journeyworker license is a personal trade credential, not a Plumbing Contractor business license.
Businesses that contract to perform plumbing work must meet the relevant contractor licensing requirements.
Minnesota's rules distinguish between full Plumbing Contractor licenses and Restricted Plumbing Contractor licenses, including geographic limits based on community population.
For full plumbing contracting, an active Master Plumber generally must serve as the responsible licensed individual.
That Master Plumber must have the proper relationship with the company and be responsible for the plumbing work performed by its employees.
The business must also provide required insurance, workers' compensation documentation, and a $25,000 surety bond.
Journeyworker: Individual plumbing license.
Master Plumber: Advanced individual license.
Plumbing Contractor: Separate business credential.
Responsible individual: Active Master Plumber.
Contractor bond: $25,000.
| Classification | Authority | Main Difference |
|---|---|---|
| Registered Unlicensed Plumber | Minnesota DLI | Registered worker completing plumbing experience under required supervision. |
| Registered Plumbing Apprentice | Minnesota DLI | Worker participating in a qualifying registered apprenticeship program. |
| Journeyworker Plumber | Minnesota DLI | State personal license requiring qualifying experience and examination. |
| Restricted Journeyworker Plumber | Minnesota DLI | Limited-scope license with different conditions and restrictions. |
| Master Plumber | Minnesota DLI | Advanced license with separate experience and examination eligibility. |
| Restricted Master Plumber | Minnesota DLI | Restricted Master classification with its own legal scope. |
| Statewide Journeyworker Exam | Minnesota DLI | 240 points, 330 minutes, 70% passing. |
| Statewide Master Plumber Exam | Minnesota DLI | 300 points, 330 minutes, 70% passing under the published DLI guide. |
| Minneapolis ICC Journeyman Plumber with Gas | Local Competency Process | Separate local ICC 498 examination with 100 questions, three hours, and fuel-gas topics. |
| Plumbing Contractor | Minnesota DLI | Separate business license with Master Plumber and supporting business requirements. |
Experience and Training
240 Points and Open-Reference Testing
Plumbing Career Advancement
This plan focuses on the plumbing systems, code knowledge, calculations, and practical exam preparation described by Minnesota DLI.
The Minnesota Journeyworker Plumber examination can be challenging because it tests many types of plumbing knowledge in one long examination session.
Candidates must earn at least 168 out of 240 points within five and a half hours.
The exam includes code requirements, practical plumbing knowledge, and mathematics.
Some questions may involve a single code requirement.
Others may require looking at several facts, following a piping diagram, or completing a calculation.
Water supply questions can involve flow, pressure, fixture demand, pipe sizes, and backflow protection.
Drainage and venting questions may involve pipe slopes, fixture units, vent arrangements, fittings, or cleanouts.
Isometric drawings can also be difficult for students who have not practiced following a piping system in three dimensions.
Another challenge is Minnesota's examination reference policy.
The exam is open reference, but the state supplies the codebook without personal tabs.
Students should learn how to navigate the 2020 Minnesota Plumbing Code efficiently before testing.
That means practicing with the correct code, not relying solely on a newer International Plumbing Code package.
Contractor Exam Preps offers a 2021 UPC Journeyman Plumber Study Guide that includes 990 questions and answer keys.
The UPC format makes it useful for general plumbing practice, but Minnesota's specific 2018 UPC-based amendments still need separate study.
The UPC Journeyman Plumber Online Course adds video lessons and examination exercises.
Practicing plumbing mathematics, diagrams, code lookups, and long examination sessions can help candidates develop stronger testing habits.
Contractor Exam Preps sells plumbing exam preparation materials that can support general water supply, drainage, venting, plumbing math, and code study.
The products below are available from ContractorExamPreps.com.
Each product has a different purpose. Choose carefully based on whether you are preparing for the statewide DLI examination or the separate Minneapolis ICC credential.
Printed UPC Study Guide and Practice Questions
Important: This is a general 2021 UPC study guide, not the official Minnesota 2020 Plumbing Code.
Video Lessons and Plumbing Practice
Important: Review Minnesota-specific code requirements separately.
Separate Minneapolis Local Credential
Important: The Minneapolis ICC exam and the statewide DLI Journeyworker exam are different examinations.
Best general UPC study option: 2021 UPC Journeyman Plumber Study Guide.
Additional practice: 2021 UPC Online Course.
Minnesota local exam books: Minneapolis ICC 498 Package.
Official statewide exam reference: 2020 Minnesota Plumbing Code.
Shopping reminder: The exact code edition and licensing exam must be verified before purchasing.
Actual Journeyman Plumber UPC Study Guide image hosted by ContractorExamPreps.com. The book is based on the 2021 UPC and is supplemental study material. The Minnesota credential artwork is educational and is not a government-issued license.
This Minnesota-themed educational credential features plumbing pipes, a water droplet, and Journeyworker licensing topics.
The actual store product image comes directly from the Contractor Exam Preps 2021 UPC Journeyman Plumber Study Guide listing.
• Minnesota Journeyworker Plumber
• Minnesota Department of Labor and Industry
• State Plumbing Licensing Examination
• 240-Point Examination
• 330-Minute Time Limit
• 70% Passing Score
• 168 Passing Points
• Open-Reference Testing
• DLI-Provided Codebook
• DLI-Provided Calculator
• 2020 Minnesota Plumbing Code
• Minnesota Rules Chapter 4714
• 2018 UPC Model Code Basis
• Minnesota Plumbing Amendments
• Plumbing System Fundamentals
• Plumbing Code Definitions
• Plumbing Materials
• Plumbing Fittings
• Water Service Piping
• Water Distribution
• Water Pressure
• Fixture Unit Calculations
• Backflow Prevention
• Cross-Connection Control
• Drain, Waste and Vent Systems
• Sanitary Drainage
• Plumbing Vents
• Pipe Slopes
• Building Drains
• Building Sewers
• Plumbing Fixtures
• Water Heaters
• Temperature and Pressure Protection
• Traps and Cleanouts
• Grease Interceptors
• Indirect Waste
• Storm Drainage
• Pipe Sizing
• Plumbing Mathematics
• Isometric Drawings
• Plumbing Inspection Requirements
• Four Years of Experience
• 7,000 Qualifying Hours
• 2,000 Water Distribution Hours
• 2,000 DWV Installation Hours
• 1,000 Fixture Installation Hours
• Registered Unlicensed Plumber Training
• Experience Verification
• DLI Exam Scheduling
• UPC Practice Questions
• Plumbing Online Courses
• Continuing Education
• Master Plumber Advancement
• Plumbing Contractor Business Licensing
Minnesota Journeyworker Plumber Licensing
Minnesota officially uses the name Journeyworker Plumber. Journeyman Plumber is a common alternative search term.
The Minnesota Department of Labor and Industry issues the state's personal plumbing licenses.
The standard pathway requires four years and at least 7,000 hours of qualifying practical plumbing experience. Other state-approved eligibility routes are also available.
Minnesota permits no more than 1,750 hours of qualifying plumbing experience to be credited during a single calendar year.
Registered unlicensed plumber applicants must document at least 2,000 hours of water distribution work, 2,000 hours of DWV installation, and 1,000 hours of fixture installation, plus additional qualifying plumbing experience.
Qualifying experience must be verified in accordance with DLI rules, including certification by the responsible licensed Master Plumber when required.
Yes. Completion of an appropriately DLI-registered plumbing apprenticeship program is one of the recognized qualification pathways.
Possibly. Minnesota reviews qualifying out-of-state licenses and experience, subject to its documentation and credit rules.
Statewide DLI Examination
Minnesota DLI administers the statewide Journeyworker Plumber examination directly.
No. The statewide Journeyworker Plumber examination is a Minnesota DLI examination.
The official DLI guide identifies the Journeyworker Plumber examination as a 240-point examination.
The DLI guide states 240 points, not 240 questions. It does not publish a definitive total question count for the Journeyworker examination.
Candidates are allowed five and a half hours, or 330 minutes.
The passing score is 70%, equivalent to 168 out of 240 points.
It is an open-reference examination, but DLI provides the permitted plumbing code, laws and rules material, and calculator.
Minnesota DLI currently lists a $50 plumbing examination application fee. Confirm the current amount before paying.
After DLI approves the application, candidates receive instructions for selecting an available examination date and location through the state's iMS scheduling system.
Applicants must wait at least 30 days before retaking a failed Minnesota plumbing licensing examination.
Minnesota Plumbing Code and References
The current published exam reference is the 2020 Minnesota Plumbing Code, Minnesota Rules Chapter 4714.
Minnesota's 2020 Plumbing Code incorporates the 2018 Uniform Plumbing Code with Minnesota-specific amendments. It is not based on the 2024 IPC.
No. DLI supplies the permitted plumbing code reference.
No. DLI provides an untabbed codebook during the examination.
DLI provides the examination calculator. Candidates should not bring their own personal calculator unless current DLI instructions specifically authorize it.
No. Commercial study guides are for preparation before the examination, not for use inside the examination building.
Plumbing Examination Topics
Study water distribution, drainage, venting, fixtures, water heaters, backflow prevention, traps, interceptors, storm drainage, materials, calculations, and Minnesota plumbing regulations.
Yes. The DLI guide includes sample calculations for water distribution, drain-waste-vent sizing, and storm drainage systems.
Yes. Plumbing diagrams help candidates understand piping layouts, fixture connections, vertical stacks, drainage systems, and vent relationships.
Yes. Backflow prevention and cross-connection protection are included in the DLI knowledge areas.
Yes. Review traps, trap seals, interceptors, separators, and approved waste arrangements.
Yes. Stormwater sizing and drainage-system calculations are included in the DLI study guide.
Master Plumber and Contractor Career Path
Yes. One standard route requires at least one year of practical plumbing experience as a licensed Journeyworker before qualifying for the Master Plumber examination.
No. Minnesota requires separate plumbing contractor business licensing.
A full Minnesota plumbing contractor license generally requires an active Master Plumber serving as the responsible licensed individual.
Yes. Minnesota DLI lists a $25,000 surety bond among the full Plumbing Contractor licensing requirements.
Renewal and Reciprocity
Journeyworker Plumber licenses expire December 31 of odd-numbered years.
Sixteen hours are required during each two-year license period, including at least eight hours related to the Minnesota State Plumbing Code.
Yes. Minnesota has reciprocal plumbing licensing agreements with North Dakota and South Dakota, subject to the state's eligibility conditions.
Contractor Exam Preps Products
Yes. The store sells a Journeyman Plumber Study Guide based on the 2021 Uniform Plumbing Code.
The Contractor Exam Preps product listing identifies 990 practice questions with answer keys.
Yes. The store offers a Journeyman Plumber Test Success Online Course based on the 2021 UPC.
No. ICC 498 is a separate Minneapolis Plumber with Gas examination, with different timing, questions, and subject requirements.
No. Minnesota's official code is the 2020 Minnesota Plumbing Code incorporating the 2018 UPC with Minnesota amendments. The 2021 UPC guide is supplemental educational material.
No. Study materials support preparation, but qualifying for the license and passing the exam depend on meeting DLI rules and individual examination performance.
Watch this directly related 1ExamPrep Journeyman Plumber exam preparation video about plumbing licensing, code study, drainage, venting, water supply, piping systems, fixtures, and plumbing examination preparation.
The video covers general Journeyman Plumber preparation across multiple states. For Minnesota-specific examination rules, use the current DLI Plumbing License Examination Guide and the 2020 Minnesota Plumbing Code.
Video: Pass the 2026 Journeyman Plumber Exam.
Creator: 1ExamPrep.
Related subjects: Plumbing licensing, water distribution, sanitary drainage, venting, plumbing fixtures, water heaters, and exam study.
Minnesota reminder: The statewide DLI examination is worth 240 points, allows 330 minutes, and uses the 2020 Minnesota Plumbing Code.
Code reminder: General plumbing video advice does not replace Minnesota's adopted code and examination instructions.
Combine official Minnesota DLI examination information with relevant plumbing study guides and educational resources from Contractor Exam Preps.
Official license: Minnesota Journeyworker Plumber.
Licensing authority: Minnesota DLI.
Examination: 240 points.
Time: 330 minutes.
Passing: 70%, or 168 points.
Current code: 2020 Minnesota Plumbing Code.
Underlying model code: 2018 UPC with Minnesota amendments.
Experience: Four years and 7,000 hours under the standard pathway.
Supplemental product: 2021 UPC Journeyman Plumber Study Guide.
Separate local credential: Minneapolis ICC 498 Plumber with Gas.
Preparing for the Minnesota Journeyworker Plumber examination is an important step for plumbing workers who want to earn a state-recognized trade license.
Minnesota issues its Journeyworker Plumber license through the Department of Labor and Industry.
The license demonstrates that an applicant has completed qualifying plumbing experience and passed the state's examination.
Under the standard registration and experience pathway, applicants must complete four years of practical plumbing experience.
That means earning at least 7,000 qualifying hours.
Minnesota also requires experience across several plumbing categories.
At least 2,000 hours must involve water distribution system installation.
Another 2,000 hours must involve drain, waste, and vent installation.
At least 1,000 hours must involve plumbing fixture installation.
The remaining hours may involve other qualifying plumbing work recognized by the state.
These experience rules help applicants build a foundation across different plumbing systems.
There are also alternative qualification pathways, including qualifying apprenticeship completion and certain restricted or out-of-state plumbing licenses.
Applicants should use the current Minnesota DLI requirements to confirm which pathway applies to their situation.
Once applicants qualify and receive examination approval, they can schedule the statewide Journeyworker Plumber test.
The current official examination guide describes the test as a 240-point examination.
Candidates have five and a half hours, or 330 minutes, to complete it.
The minimum passing score is 70%.
That equals 168 points.
One important point is that the published 240-point total is not the same as a published count of 240 examination questions.
Students should use the official wording when reviewing the examination requirements.
The test is an open-reference examination, but the state supplies the permitted materials.
Those materials include the Minnesota Plumbing Code, the applicable laws and rules reference, and a calculator.
Candidates cannot bring their own personalized plumbing codebook, study guides, or unauthorized materials into the examination building.
This makes code navigation an important study skill.
Learning how the code is organized can save valuable time during the examination.
The current Minnesota examination reference is the 2020 Minnesota Plumbing Code.
This code incorporates the 2018 Uniform Plumbing Code with Minnesota amendments.
It is important to understand that the UPC and International Plumbing Code are not identical.
Products based on newer IPC editions may provide general plumbing knowledge, but they should not replace the actual Minnesota Plumbing Code during state-specific preparation.
The Minnesota Journeyworker examination covers many subjects.
Water distribution is important because plumbers must understand how safe water reaches plumbing fixtures.
Drainage and venting are also essential because plumbing systems must remove wastewater while helping maintain trap seals.
Plumbing fixtures include toilets, sinks, lavatories, showers, bathtubs, floor drains, and other connected equipment.
Backflow prevention protects potable water from contamination.
Water heaters require appropriate temperature and pressure protection.
Traps, interceptors, and special waste arrangements introduce additional rules.
Storm drainage requires understanding roof drains, leaders, areas, rainfall considerations, and pipe-sizing methods.
Plumbing mathematics and isometric drawings are important because they connect code requirements to actual piping systems.
Students should practice water pipe sizing, drainage fixture units, venting layouts, developed pipe lengths, and storm drainage calculations.
They should also learn how plumbing materials, fittings, supports, joints, and inspection requirements affect code compliance.
Contractor Exam Preps offers the Journeyman Plumber Study Guide Based on the 2021 Uniform Plumbing Code.
The guide includes 990 practice questions with answer keys.
It covers general plumbing knowledge, UPC topics, isometric drawings, calculations, and examination strategies.
It is a useful supplemental study resource because it follows the UPC family of codes.
However, its 2021 UPC foundation differs from Minnesota's 2018 UPC-based code.
Candidates should always prioritize the current Minnesota code and state amendments when studying for the DLI examination.
Contractor Exam Preps also offers a Journeyman Plumber Online Course Based on the 2021 UPC.
The course provides plumbing instruction, videos, isometric practice, and simulated examinations.
These materials can help students review difficult subjects and practice answering plumbing questions more consistently.
The store also has a Minnesota Minneapolis Journeyman Plumber with Gas book package.
That package serves a separate local ICC examination, not the statewide DLI Journeyworker exam.
It is especially important not to confuse the two credentials because their question formats, time limits, and subject requirements differ.
A practical six-week study schedule can help applicants organize their preparation.
Begin with Minnesota code organization and general plumbing regulations.
Continue with sanitary drainage, venting, water distribution, and backflow prevention.
Then study plumbing fixtures, water heaters, traps, interceptors, special waste, and storm drainage.
Finish by practicing plumbing mathematics, isometric diagrams, and longer examination sessions.
During the final week, review incorrect answers and repeat difficult questions until the underlying rules make sense.
After receiving a Journeyworker Plumber license, professionals must continue following state licensing and continuing education requirements.
Minnesota requires 16 hours of approved continuing education during the normal two-year license period, including eight hours related to the State Plumbing Code.
Licensed Journeyworker Plumbers may also continue toward Master Plumber qualification.
The standard advancement pathway includes at least one year of experience while licensed as a Journeyworker.
The Master Plumber credential can then become important for plumbing contractor business licensing.
Minnesota generally requires a full plumbing contractor to have an active Master Plumber serving as its responsible licensed individual.
The contracting business must also satisfy separate insurance, bonding, and licensing requirements.
The goal of Minnesota Journeyworker Plumber exam preparation is not simply to earn passing points.
It is to build the knowledge needed to install safe water supplies, reliable drainage systems, properly vented piping, and code-compliant plumbing fixtures.
By studying the official Minnesota Plumbing Code, practicing calculations and diagrams, and using relevant Contractor Exam Preps study resources, candidates can prepare more effectively for the Minnesota Journeyworker Plumber licensing examination.
Find Journeyman Plumber study guides, UPC plumbing review materials, practice questions, online instruction, and related Minnesota exam prep resources at ContractorExamPreps.com.
