Delaware Plumbing Apprenticeship • Journeyman Certificate • IPC Study • Master Plumber Career Path
Getting ready to advance your plumbing career in Delaware? This guide explains how to build your plumbing knowledge, complete an approved apprenticeship, prepare for trade assessments, and understand the path from journeyman experience to a Delaware Master Plumber license.
Study the subjects that matter on the job: water supply, sanitary drainage, waste and vent systems, fixtures, pipe sizing, traps, cleanouts, water heaters, backflow prevention, gas piping, plumbing mathematics, and safety.
Important Delaware licensing distinction: Delaware recognizes a Journeyman Plumber Certificate issued through a federally approved plumbing apprenticeship program, such as one associated with the Delaware Department of Labor. However, the state plumbing board does not list a separate statewide Journeyman Plumber licensing examination.
The state-regulated plumbing credential is the Master Plumber license, issued by the Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners.
Journeymen may perform plumbing work under the supervision of a properly licensed master plumber when the conditions of Delaware law are met. This is different from holding an independent master-level license.
For future advancement, applicants with an accepted journeyman apprenticeship certificate generally need at least two additional years of supervised plumbing experience before qualifying for the Delaware Master Plumber examination.
The alternative route requires seven years of supervised plumbing experience and a Board-approved apprenticeship equivalency examination.
The current ProV Delaware Master Plumber examination contains 100 questions, allows three hours, and requires a 70% passing score. Those numbers describe the Master Plumber exam, not a separate Delaware journeyman exam.
Contractor Exam Preps offers the 2026 Delaware Journeyman Plumber Complete Books, Tabs and Course Package, plus printed guides, practice questions, and online study options.
These study products include materials based on the 2024 International Plumbing Code or 2021 IPC, depending on the package. They are useful for technical review, but should not be confused with official Delaware exam-room reference books.
The current ProV Master Plumber bulletin lists the 2018 International Plumbing Code, 2018 International Fuel Gas Code, and Plumbing Basics for Contractors, Third Edition as approved references.
This guide will help you understand your licensing path, choose appropriate study materials, learn essential plumbing topics, practice code navigation, and develop a six-week study schedule.
Important Delaware plumbing licensing update: Delaware's Board issues Master Plumber licenses and recognizes qualifying journeyman apprenticeship certificates when reviewing applications. Do not assume that a product advertised as "Delaware Journeyman Plumber Exam Prep" corresponds to a separate statewide ProV journeyman licensing test. The official Delaware Master Plumber exam is 100 questions in three hours, with 70% required to pass. Its current listed exam references are the 2018 IPC, 2018 IFGC, and Plumbing Basics for Contractors, Third Edition. The 2021 and 2024 IPC books sold in newer study packages are supplemental preparation materials for this Delaware state exam unless ProV updates its approved reference list.
A journeyman plumber is a skilled tradesperson who has developed practical plumbing experience and typically completed an approved apprenticeship program.
Journeymen understand how to install, service, maintain, repair, and troubleshoot plumbing systems. Their work may include residential homes, commercial buildings, and other plumbing installations.
The Delaware Board distinguishes between a journeyman apprenticeship certificate and the Master Plumber license that it issues.
A recognized journeyman certificate provides evidence that a plumber completed an acceptable apprenticeship program. It is an important qualification for the state's master-level licensing pathway.
Under Delaware law, journeymen and apprentices may perform covered plumbing work without holding an individual Master Plumber license when working under the required master-plumber supervision.
For example, a journeyman may work on potable water supply piping, bathroom fixtures, drainage installations, or vent systems while meeting the applicable supervision and employment requirements.
Successful plumbing work takes more than knowing which pipe connects to which fitting. Installers must consider pressure, water quality, materials, slope, flow, venting, drainage, sanitation, and inspection requirements.
A drainage system installed at the wrong slope can cause ongoing problems. A water supply connection without suitable backflow protection can create a health hazard. These details explain why plumbing education and field training both matter.
Completing an approved apprenticeship is therefore an important professional milestone, even though Delaware does not list a separate statewide Journeyman Plumber licensing exam.
Plumbers who eventually want independent licensing authority should review the requirements for becoming a Delaware Master Plumber.
Journeyman credential: Certificate from an acceptable plumbing apprenticeship program.
State plumbing license: Master Plumber.
Regulatory agency: Delaware Division of Professional Regulation.
State board: Board of Plumbing and HVACR Examiners.
Master exam provider: ProV.
Employment and supervision: Follow Delaware's plumbing statute.
Review the official Delaware Master Plumber licensing requirements before making decisions about certification or examination registration.
Use this roadmap to understand the difference between apprenticeship completion, journeyman certification, and a Master Plumber license.
| Step | Requirement | What to Verify |
|---|---|---|
| Choose Plumbing Training | Approved Apprenticeship | Confirm the program meets applicable recognized apprenticeship standards. |
| Complete Classroom Instruction | Program Requirements | Verify the hours and coursework required by your registered apprenticeship. |
| Complete On-the-Job Training | Supervised Plumbing Work | Document practical duties, training and supervision. |
| Obtain Completion Certificate | Journeyman Certificate | Keep an official copy of your apprenticeship program completion record. |
| Continue Supervised Work | At Least 2 Years | This is the post-certificate work requirement for the Master Plumber exam route. |
| Alternative Route | 7 Years | Applicants without an acceptable journeyman certificate need supervised experience and an approved equivalency assessment. |
| Prepare Documents | Work Verification | Gather required employment evidence and certificate records. |
| Apply Through DELPROS | Master License Application | Submit the correct application and supporting information. |
| Receive Board Approval | Exam Eligibility | Wait for official authorization before scheduling the ProV exam. |
| Prepare ProV Books | Approved References | Check the 2018 code editions in the current bulletin. |
| Pass Master Examination | 100 Questions | Three hours and a 70% passing requirement. |
| Complete License Issuance | Board Review | Meet all remaining Delaware licensing requirements. |
Delaware does not publish a separate statewide Journeyman Plumber licensing exam outline under its plumbing board. The following official ProV details apply to the Delaware Master Plumber examination.
| Exam Detail | Authority | Current Information |
|---|---|---|
| State Journeyman Plumbing Exam | Delaware Board | Not separately listed as a statewide licensure exam. |
| Journeyman Credential | Apprenticeship Program | Accepted completion certificate from approved program. |
| Official State Plumbing Exam | Delaware Board | Master Plumber. |
| Testing Provider | ProV | Computer-based licensing examination. |
| Exam Questions | ProV | 100. |
| Time Limit | ProV | 3 hours / 180 minutes. |
| Passing Score | Delaware | 70%. |
| Exam Format | ProV | Open book using approved references. |
| 2018 IPC | ProV | Approved Master Plumber reference. |
| 2018 IFGC | ProV | Approved Master Plumber reference. |
| Plumbing Basics for Contractors | ProV | Third Edition, 2014. |
| 2021 IPC Study Packages | Retail Study Materials | Supplemental preparation, not currently listed as a ProV Master exam reference. |
| 2024 IPC Study Packages | Retail Study Materials | Supplemental preparation, not currently listed as a ProV Master exam reference. |
| General Knowledge | ProV | 16 questions. |
| Isometrics and Plans | ProV | 8 questions. |
| Plumbing Math | ProV | 8 questions. |
| Drainage and Venting | ProV | 14 questions. |
| Water Supply | ProV | 14 questions. |
| Fixtures and Fittings | ProV | 8 questions. |
| Water Heaters | ProV | 10 questions. |
| Fuel Gas Systems | ProV | 10 questions. |
| Storm and Roof Drainage | ProV | 6 questions. |
| Safety | ProV | 6 questions. |
| Exam Fee | ProV | $100 in the June 2025 bulletin; confirm before scheduling. |
Important: The official test figures above belong to Delaware's Master Plumber examination.
Journeyman: Recognized apprenticeship certificate rather than a separate statewide licensing examination.
Current official ProV reference list: 2018 IPC, 2018 IFGC and Plumbing Basics for Contractors, Third Edition.
Always verify: Testing details before exam registration.
A good journeyman plumbing study plan covers the same fundamentals that help plumbers perform safe, code-compliant work every day.
Study potable water distribution, pipe sizing, water pressure, valves, water service piping, and safe supply connections. Delaware's Master Plumber exam includes 14 questions in this category.
Learn sanitary drainage, branch drains, stacks, slopes, traps, vent arrangements, cleanouts, and proper waste removal. This is also a 14-question Master exam category.
Review common plumbing terminology, equipment, installation methods, pipe materials, fittings, and basic code requirements. General Knowledge has 16 questions on the official Master exam.
Practice measurement conversions, water volume, pressure, pipe sizing calculations, fixture units, and basic formulas. Eight Master exam questions cover plumbing math.
Learn to follow pipe routes on drawings, interpret symbols, identify connections, and understand system layouts. Eight Master exam questions involve plans and isometrics.
Review sinks, toilets, lavatories, showers, traps, fittings, fixture connections, and installation requirements. Eight official Master questions are in this area.
Understand water heater installation, relief valves, expansion control, piping connections, energy sources, and safety. Water Heaters accounts for ten Master exam questions.
Study piping materials, appliance connections, installation rules, testing, shutoff devices, and venting considerations. Fuel Gas Systems contains ten Master exam questions.
Prepare for roof drains, storm water systems, sizing, and appropriate discharge methods. Delaware's Master exam lists six questions.
Review personal protection, safe excavation, testing practices, tools, and jobsite hazards. Safety also contains six questions.
The official Master exam outline is useful as a study reference, but it should not be presented as an official Delaware Journeyman Plumber exam blueprint.
Begin with your apprenticeship program's curriculum and any specific assessment instructions supplied by your training provider.
Because Delaware does not list a separate statewide Journeyman Plumber exam, an apprentice should not assume that the ProV Master Plumber exam outline is the exact assessment used by their school.
Start by strengthening water supply and sanitary drainage knowledge. Both subjects appear in ordinary fieldwork and advanced plumbing examination preparation.
Next, review traps, venting, fixture units, piping materials, fittings, water heaters, and cross-connection control.
Practice plumbing math every week. Calculations are easier when you understand why each number matters instead of copying a memorized answer.
Drainage: Pipe slopes, branches, stacks, cleanouts and fixture connections.
Venting: Trap protection, vent arrangements and system operation.
Water Supply: Pressure, pipe sizing, water service and distribution.
Fixtures: Installation standards, traps and connections.
Backflow: Cross-connection protection and potable water safety.
Water Heaters: Safety devices, pressure and temperature relief.
Fuel Gas: Piping materials, appliance connections and applicable rules.
Plumbing Math: Measurements, pressure, volume and sizing problems.
Plan Reading: Isometric drawings and piping arrangements.
Safety: Tools, equipment, excavation and workplace precautions.
For structured practice, review the 2026 Delaware Journeyman Plumber Study Guide based on the 2024 IPC.
If you are preparing for the actual state Master Plumber exam, use the specific editions listed in ProV's current candidate bulletin for your official exam-room reference practice.
Understanding how different plumbing systems connect makes code study easier. The diagram below illustrates the relationship between water supply piping, a sink, water heater, drain line, vent stack and building sewer.
Simplified educational illustration. Not a code-approved installation drawing.
Follow these eight steps to move from basic plumbing training toward advanced professional qualifications.
Confirm that the plumbing program meets accepted apprenticeship requirements and provides recognized completion documentation.
Learn installations involving water piping, drainage, venting, fixtures, materials, testing and safety.
Finish the classroom education and supervised fieldwork specified by the program.
Obtain your official apprenticeship completion record and retain copies for future license applications.
For the usual master-level examination path, accumulate at least two years of supervised experience after receiving the qualifying certificate.
Submit your documentation through DELPROS and wait for Board approval before scheduling the required examination.
Study 100-question exam topics, use the authorized 2018 references, and practice completing the test in three hours.
Meet Delaware's remaining application conditions and obtain official state approval before representing yourself as a licensed Master Plumber.
The following percentages come from the current ProV Master Plumber examination outline. They are included to help journeyman plumbers understand the subjects involved in future master-level licensing.
Total Master Plumber questions: 100.
Largest category: General Knowledge, 16 questions.
Water supply and drainage combined: 28 questions.
Required passing score: 70%.
Remember: These weights apply to the Master exam, not a separate Delaware statewide journeyman examination.
The current Delaware ProV Master Plumber examination allows specific reference books. Check the current candidate bulletin rather than assuming that every edition sold in a study package is authorized for the testing room.
| Reference | Edition | Purpose |
|---|---|---|
| International Plumbing Code | 2018 | Plumbing systems, fixtures, drainage, venting, water supply and installation rules. |
| International Fuel Gas Code | 2018 | Fuel gas piping, appliances, connection requirements and safety. |
| Plumbing Basics for Contractors | 3rd Edition, 2014 | General plumbing knowledge and contractor-level trade concepts. |
| 2021 IPC | Study Edition | Useful for home preparation; not currently listed as the official Master exam reference. |
| 2024 IPC | Study Edition | Useful for newer code study; not currently listed as the official Master exam reference. |
Approved: The three books listed in the current Master Plumber ProV bulletin.
Permanent tabs: Permitted on approved references.
Highlighting: Permitted before the test under ProV rules.
Not allowed: Handwritten notes, movable tabs, loose papers, unauthorized study guides and practice examinations in the testing room.
Edition warning: An included 2024 IPC does not replace a listed 2018 IPC for the current Delaware Master exam.
Open-book exams reward candidates who know how to find information. A reference book is helpful, but it cannot perform code lookups by itself.
For the Delaware Master Plumber exam, ProV permits appropriate highlighting, pen underlining, and permanent tabs prepared before testing.
Master exam time: 180 minutes for 100 questions, averaging 1.8 minutes per question.
Calculator: ProV permits a basic four-function calculator under its published rules.
Most important strategy: Know which reference contains the rule before opening the book.
Delaware law provides an exemption that allows apprentices, journeymen, mechanics, and certain other plumbing workers to perform plumbing services under the required supervision of a master plumber.
The master plumber must be the worker's employer or employed full time by the same business entity, as described in the statute.
Within that arrangement, a journeyman may work on potable water distribution, fixture installations, drainage, waste piping, vent systems, water heaters, and other authorized plumbing operations.
The work may involve measuring, cutting, joining, supporting, and testing different plumbing materials.
Journeymen should recognize when a pipe size, material, slope, fitting, connection or protection device does not meet the applicable code.
For example, a venting mistake may affect multiple fixtures, while poor water supply design can result in low pressure and poor fixture performance.
Backflow prevention is another essential topic. Plumbing systems must protect drinking water from possible contamination.
Journeymen may also study fuel gas piping and appliance connections, but those installations must comply with the applicable scope, supervision requirements, and safety rules.
Being able to complete a job is not the same as having legal permission to offer independent plumbing services as a licensed contractor.
The Delaware Master Plumber license is the state-regulated credential for performing licensed plumbing services outside the relevant exemptions.
For long-term career planning, learning how fieldwork connects to master-level code and business responsibilities is a smart investment.
Journeyman: Skilled plumbing worker operating under applicable supervision requirements.
Master Plumber: State-licensed professional with additional authority and responsibility.
Code: Follow applicable Delaware and local plumbing rules.
Independent practice: Do not represent a journeyman apprenticeship certificate as a Master Plumber license.
| Classification | Credential Type | Requirements or Authority |
|---|---|---|
| Plumbing Apprentice | Registered Training Participant | Completes approved classroom education and supervised work. |
| Journeyman Plumber | Apprenticeship Certificate | Obtains a recognized program completion certificate and works under applicable master supervision. |
| Master Plumber | State License | Board-approved qualifications, passing ProV exam and completed licensing application. |
| Journeyman Certificate Route | Master Eligibility Path | Qualifying certificate plus at least two years of subsequent supervised plumbing experience. |
| Experience Equivalency Route | Master Eligibility Path | Seven years of supervised experience plus the approved apprenticeship equivalency assessment. |
| Master ProV Examination | Trade Examination | 100 questions, three hours, 70% passing score. |
| Master HVACR | Separate State License | May be needed for HVACR work beyond Master Plumber licensing authority. |
Important distinction: A journeyman apprenticeship certificate is not an independently issued Delaware Master Plumber license.
Exam provider: ProV administers the Master Plumber examination following Board approval.
Local requirements: Permits and inspection rules may also apply to plumbing work.
Learn and Document Your Skills
Path Toward Master Exam Eligibility
Applicants Without a Qualifying Certificate
Training hours: Verify actual program hours with your apprenticeship sponsor; a single statewide journeyman exam-hour standard is not stated in the ProV Master bulletin.
Experience: Delaware provides separate qualification routes for applicants with and without a qualifying journeyman certificate.
Master exam: Passing the exam is only one part of licensing.
Use this six-week schedule to improve plumbing trade knowledge and prepare for apprenticeship assessments, technical evaluations, or later master-level study.
Plumbing assessments can feel difficult because there are many topics to remember and many small details that affect the correct answer.
Field experience is valuable. However, knowing how to install a drain does not automatically mean you can answer a code question about fixture-unit loading or vent sizing.
Exam-style questions may ask you to select a pipe material, calculate a system size, identify an installation problem, or interpret a drawing.
Water supply and drainage are excellent starting points because they connect directly to everyday plumbing work.
Plumbing math deserves regular practice. Even a small mistake in measurement or unit conversion can change the entire answer.
Isometric drawings may also look confusing at first. With repetition, they become easier to read because you begin to recognize familiar pipe routes and connections.
Venting questions can be especially tricky when similar-looking arrangements have different code requirements.
Code edition differences add another challenge. Contractor Exam Preps offers products based on the 2021 and 2024 IPC, while the current Delaware ProV Master exam lists the 2018 IPC and IFGC.
Use the edition appropriate for your training program, and separately prepare with official approved references when sitting for a regulated licensing examination.
If your goal is the Delaware Master Plumber license, you must also plan for 100 questions in three hours.
That is an average of 1.8 minutes per question. Knowing where to find information matters almost as much as knowing what it means.
Steady study sessions, practice questions, and careful review of mistakes are more effective than trying to memorize every code section in one weekend.
Remember, plumbing is not just about making water move. It is about making water move safely, predictably, and in the correct direction!
The following checklist is intended for candidates preparing for an official Delaware ProV Master Plumber test. Journeyman apprenticeship assessments may have different requirements.
Official exam: Delaware Master Plumber.
Testing provider: ProV.
Question count: 100.
Time: Three hours.
Passing score: 70%.
Retesting: Delaware plumbing applicants who fail three attempts must meet the state's reapplication and waiting-period requirements.
Contractor Exam Preps offers Delaware-specific plumbing study packages, International Plumbing Code reference sets, online learning tools, and practice questions.
The products below are designed for technical review. Confirm the requirements of your apprenticeship assessment or licensing exam before choosing a package.
2024 IPC | Complete Preparation
2024 IPC | Guided Review
2021 IPC | Printed Book Package
Study guide only: 2026 Delaware Journeyman Plumber Study Guide, 2024 IPC.
General study option: Journeyman Plumber Study Guide, 2021 IPC.
Additional online learning: Journeyman Plumber Test Success Online Course.
Code edition reminder: The current Delaware ProV Master exam reference list specifies 2018 plumbing and fuel gas codes. Newer study packages do not change that official rule.
This custom Delaware plumbing credential illustration features the Delaware state outline, a pipe wrench, water droplet, water supply piping, a sink, and a sanitary drainage system.
It represents plumbing education and exam preparation. It is not a Delaware government-issued journeyman license or apprenticeship certificate.
• Delaware Plumbing Apprenticeship
• Recognized Journeyman Certificate
• Supervised Plumbing Work
• Delaware Department of Labor
• Board of Plumbing and HVACR Examiners
• Water Supply and Distribution
• Sanitary Drainage
• Drain, Waste and Vent Systems
• Plumbing Fixtures
• Traps and Cleanouts
• Backflow Prevention
• Water Heaters
• Fuel Gas Systems
• Plumbing Materials
• Pipe Sizing
• Plumbing Mathematics
• Isometric Drawings
• Plan Reading
• Storm Drainage
• Jobsite Safety
• International Plumbing Code
• Master Plumber Advancement
• ProV Licensing Examination
Build stronger plumbing knowledge with code review, practice questions, calculations, diagrams, and a structured study schedule.
Delaware Journeyman Plumber Certification
Delaware's plumbing board issues Master Plumber licenses. It recognizes qualifying journeyman certificates earned through approved plumbing apprenticeship programs, but it does not list a separate statewide Journeyman Plumber licensing examination.
It is a certificate of completion from an acceptable plumbing apprenticeship program. It can help establish the qualifications needed for a future Master Plumber license application.
Acceptable journeyman certificates come from federally approved plumbing apprenticeship programs, such as programs associated with the Delaware Department of Labor.
Journeymen may perform plumbing services under the supervision and employment conditions provided by Delaware law. This does not give them independent Master Plumber licensing authority.
Requirements depend on the recognized apprenticeship program. Contact your apprenticeship sponsor or the Delaware Department of Labor for the exact classroom and on-the-job training requirements.
Alternative routes depend on the credential and program. For Delaware Master Plumber exam eligibility, applicants without a qualifying journeyman certificate may use the separate seven-year supervised-experience and equivalency-examination route.
Delaware Master Plumber Exam Information
ProV administers the state licensing examination after Delaware's Board approves the applicant.
The current ProV bulletin lists 100 questions.
Three hours, or 180 minutes.
Delaware requires 70% on its plumbing licensing examination.
Yes. Candidates may use the specific reference books approved by ProV.
Apply through DELPROS and obtain approval from the Delaware Board. Eligible candidates receive ProV registration information after approval.
Delaware plumbing applicants who fail after three attempts must wait one year and reapply as a new applicant under the state's rules.
Plumbing Books and Code Editions
The current ProV Master Plumber candidate bulletin lists the 2018 International Plumbing Code.
The 2018 International Fuel Gas Code is listed as an approved reference.
Plumbing Basics for Contractors, Third Edition, 2014.
Not as a substitute under the currently published ProV reference list. The 2024 IPC is useful for supplementary study, but the Master exam currently lists the 2018 IPC.
Yes. ProV permits permanent tabs on approved references, subject to its published preparation rules.
No. ProV does not permit test-preparation study guides or practice exams as testing-room references.
Plumbing Examination Study Subjects
Important subjects include water supply, sanitary drainage, venting, fixtures, pipe sizing, traps, water heaters, backflow prevention, gas piping, plumbing math, plan reading, and safety.
Yes. Drainage and venting are essential plumbing subjects and account for 14 questions on Delaware's official Master Plumber exam.
Yes. Backflow prevention protects potable water against contamination and is an important part of plumbing code knowledge.
Yes. The ProV content outline contains eight plumbing mathematics questions.
Yes. Water Heaters accounts for ten questions.
Yes. Fuel Gas Systems accounts for ten questions in the current Delaware Master Plumber outline.
Isometric drawings show piping routes and connections in a three-dimensional style. They help plumbers understand water supply, drainage and vent system layouts.
Journeyman to Master Plumber Advancement
For the Delaware Master Plumber examination route based on a qualifying journeyman certificate, applicants must document at least two years of supervised plumbing experience after receiving that certificate.
Delaware provides an alternative route requiring seven years of acceptable supervised plumbing experience and an approved apprenticeship equivalency test.
No. A journeyman apprenticeship certificate is not a Delaware Master Plumber license.
Contractor Exam Preps Products
Yes. The store lists Delaware Journeyman Plumber study guides, printed IPC packages, and online learning packages.
The product lists a 2024 IPC reference, tabs, study guide, practice questions, online course, instructional videos, and flash cards.
Yes. Contractor Exam Preps offers a 2026 Delaware Journeyman Plumber Study Guide based on the 2024 IPC.
No. Study materials support preparation, but they do not replace approved apprenticeship completion, Board eligibility, official examination requirements, or license approval.
Watch this related 1 Exam Prep International Plumbing Code overview. It explains important code navigation and plumbing study concepts, including fixtures, water distribution, sanitary drainage, venting, piping systems and installation requirements.
Video: International Plumbing Code Overview - Course Preview.
Channel: 1 Exam Prep.
Related topics: Fixtures, piping, drainage, venting, installation standards and code navigation.
Delaware note: This general educational video covers multiple IPC editions. The current state Master Plumber ProV exam reference list specifies the 2018 IPC.
Use Contractor Exam Preps for plumbing study guides, IPC review, practice questions, and online learning. Use Delaware's official agencies and ProV for credential and examination requirements.
Delaware journeyman: Recognized apprenticeship certificate.
State plumbing license: Master Plumber.
Master exam: 100 questions, three hours, 70% passing.
Master testing references: 2018 IPC, 2018 IFGC and Plumbing Basics for Contractors, Third Edition.
Study products: Newer editions are educational resources unless officially approved for testing.
Official licensing: Verify requirements directly with the Delaware Board.
Prepare for the next step in your Delaware plumbing career with stronger knowledge of water supply, sanitary drainage, venting, fixtures, water heaters, pipe sizing, fuel gas systems, plumbing mathematics, and safety.
A Delaware journeyman certificate documents acceptable apprenticeship completion and may support the pathway toward becoming a licensed Master Plumber.
Remember that Delaware does not separately list a statewide Journeyman Plumber ProV licensing exam. The state-regulated plumbing examination is for Master Plumber applicants.
The official Master Plumber examination contains 100 questions, allows three hours, and requires 70% to pass.
The examination is open book, but candidates must follow ProV's rules and bring only approved reference materials.
The current list includes the 2018 International Plumbing Code, 2018 International Fuel Gas Code, and Plumbing Basics for Contractors, Third Edition.
Contractor Exam Preps offers modern Delaware plumbing study products based on the 2024 IPC, plus other packages based on the 2021 IPC.
These resources can help plumbers review drainage and venting, understand water distribution, practice calculations, and improve their code navigation skills.
The 2026 Delaware Journeyman Plumber Complete Package includes printed resources, online lessons, practice questions, and review materials.
The Delaware Study Guide and Online Course offers another way to organize your study sessions.
Start by confirming your exact training or licensing requirements. Choose the right books, study a few topics each week, and review every missed answer.
Build skills that help both in assessments and on the job. Understanding plumbing code is about much more than passing a test. It is about protecting water quality, maintaining safe systems, and completing reliable installations.
Strong plumbing knowledge is built one lesson, one installation, and one correct decision at a time.
Find more plumbing and contractor licensing study materials at ContractorExamPreps.com.
