ICC Master Plumber w/Gas - G27-N - Online Exam Prep

The ICC Master Plumber w/Gas - G27-N - Online Exam Prep course is designed for candidates preparing for the ICC National Standard Master Plumber with Gas exam. This exam focuses on advanced plumbing code knowledge, fuel gas code requirements, plumbing system design and installation, water supply and distribution, sanitary drainage, venting, traps, interceptors, separators, storm drainage, gas piping, combustion air, chimneys, vents, and plan-reading skills.

This online exam prep product helps candidates study the International Plumbing Code, 2018 and the International Fuel Gas Code, 2018 in a structured and practical way. These two references are essential for the G27-N exam. The plumbing portion requires candidates to understand fixture requirements, drainage systems, venting, water heaters, water distribution, indirect waste, traps, cleanouts, and storm drainage. The gas portion requires candidates to understand fuel gas piping, appliance connections, pipe sizing, shutoff valves, regulators, combustion air, vents, chimneys, testing, and safety provisions.

Master-level plumbing with gas work requires more than basic trade familiarity. Candidates should be able to apply code requirements to jobsite conditions, system layouts, installation scenarios, plan details, and safety-related questions. This course supports that preparation by helping candidates connect field experience with the code-based format of the ICC G27-N exam.

Many candidates preparing for the G27-N exam already have years of plumbing or gas piping experience. That experience is valuable, but the exam requires the answer supported by the approved references. A candidate may know how work is commonly performed in the field, but the exam may ask for the specific code section, table, definition, exception, or requirement found in the International Plumbing Code or International Fuel Gas Code. This course helps candidates practice the code-navigation skills needed for that type of testing.

The G27-N exam is an open book exam, but open book testing still requires serious preparation. Candidates who are unfamiliar with the references can lose time searching through the wrong chapter or applying the wrong table. A strong preparation plan includes repeated use of both books, careful review of definitions, practice with sizing tables, and timed exam-style review. This online course helps organize those study efforts into a clearer path.

This course is a strong fit for working plumbers, gas piping professionals, supervisors, contractors, and licensing candidates who need flexible exam preparation. Because the training is online, you can study around service calls, jobsite responsibilities, inspections, crew management, family obligations, and licensing deadlines. The course gives you a practical way to review major exam subjects without attending a live classroom at a fixed time.

Exam Details

The ICC G27-N National Standard Master Plumber with Gas exam evaluates advanced plumbing and fuel gas code knowledge. Candidates should be prepared for questions involving administration and general regulations, plumbing fixtures, water heaters, water supply and distribution, sanitary drainage, plumbing vent requirements, traps, interceptors, separators, storm drainage, gas piping, combustion air, chimneys, vents, and plan reading.

The references provided for this product are:

• International Plumbing Code, 2018
• International Fuel Gas Code, 2018

The exam is code-based, so candidates should prepare to locate and apply requirements from both approved references. Some questions may involve direct code lookup, while others may present a plumbing layout, gas piping condition, fixture installation, venting issue, drainage scenario, appliance connection, or plan-reading problem. Candidates should read each question carefully and determine which book applies before searching for the answer.

Important study areas include general regulations, plumbing fixtures, water heaters, water supply and distribution, sanitary drainage, vents, traps, interceptors, separators, storm drainage, gas piping, fuel gas appliances, combustion air, chimneys, vents, and related safety provisions. Candidates should also study code definitions because a single defined term can affect how a question should be interpreted.

Using the correct editions matters. Exam questions are tied to the listed references, and code wording, tables, section numbers, definitions, and exceptions can change between editions. Candidates preparing for this product should study with the International Plumbing Code, 2018 and the International Fuel Gas Code, 2018.

Open Book Test

The ICC Master Plumber w/Gas G27-N exam is an open book test. Candidates may use the approved references during the exam, but they must know how to use those books efficiently. Open book testing rewards candidates who are organized, familiar with the code books, and comfortable locating information under timed conditions.

For this exam, candidates should become comfortable using both the International Plumbing Code, 2018 and the International Fuel Gas Code, 2018. You should know how to use the table of contents, index, chapter organization, definitions, tables, figures, footnotes, notes, and exceptions. Many questions require more than finding a section number. Candidates must read the full requirement and apply it correctly to the situation described in the question.

A strong open book strategy begins with identifying the subject. If the question involves plumbing fixtures, water distribution, sanitary drainage, venting, traps, cleanouts, storm drainage, or plan reading, the International Plumbing Code is usually the primary reference. If the question involves gas piping, pipe sizing, regulators, appliance connections, combustion air, chimneys, vents, vent connectors, testing, or fuel gas system installation, the International Fuel Gas Code is usually the primary reference.

Open book does not mean the answer will be obvious. Many questions turn on a specific condition, material, fixture type, pipe size, developed length, appliance input, venting arrangement, or exception. Candidates should practice reading the question fully, selecting the correct reference, locating the relevant section, and confirming the answer before moving on.

Licensing Steps

The ICC G27-N exam may be used by state, county, city, or local licensing authorities as part of a master plumber with gas licensing process. Licensing requirements are controlled by the jurisdiction where the candidate plans to work. Passing the exam may satisfy a testing requirement in some locations, but it does not automatically create a plumbing or gas license by itself.

A typical licensing path may include identifying the correct license classification, confirming that the G27-N exam is accepted for that license, reviewing application and experience requirements, preparing for the exam, registering through the approved testing process, taking the exam, and submitting required documentation to the licensing authority.

Some jurisdictions may require documented trade experience, journeyman-level experience, supervisor verification, employment records, application approval, insurance, bonding, background checks, continuing education, or additional exams. Plumbing and gas work may also have different supervision, permitting, and business operation rules depending on the jurisdiction.

This online course focuses on preparation for the ICC Master Plumber w/Gas G27-N exam. Candidates should confirm that the G27-N exam matches the license classification they are pursuing before registering for the test.

State Requirements

Plumbing and gas licensing requirements vary by state and local jurisdiction. Some agencies use ICC National Standard exams as part of the licensing process, while others may use state-specific exams, board-administered exams, local exams, or additional qualification requirements. The G27-N exam may be accepted in one jurisdiction and not accepted in another.

Candidates should confirm the accepted exam ID, application process, experience requirements, required documentation, passing score rules, renewal requirements, continuing education obligations, and any additional exams required by the licensing authority. This is especially important for candidates who work near state lines, serve multiple municipalities, or operate a plumbing business across different service areas.

Licensing rules may also affect the scope of work allowed under the license. A master plumber with gas credential may have specific rules for supervision, permitting, business ownership, gas piping, appliance connections, plumbing system installation, and inspection responsibilities. Candidates should understand how the license applies to the work they plan to perform.

Reference Books

• International Plumbing Code, 2018
  This code reference establishes requirements for plumbing systems, including administration, definitions, fixtures, water heaters, water supply and distribution, sanitary drainage, vents, traps, interceptors, separators, storm drainage, indirect waste, cleanouts, materials, and plumbing safety provisions. Candidates should study the organization of the book, definitions, tables, figures, notes, exceptions, and chapter layout so they can locate information efficiently during the open book exam.
• International Fuel Gas Code, 2018
  This code reference covers fuel gas piping systems, gas-fired appliances, combustion air, chimneys, vents, pipe sizing, materials, joints, fittings, valves, regulators, appliance connections, testing, inspection, and safety requirements. Candidates should practice using the book to locate gas piping rules, sizing tables, appliance installation requirements, combustion air provisions, and venting requirements.

Exam Room Approved Books

The approved exam references for this open book exam prep product are:

• International Plumbing Code, 2018
• International Fuel Gas Code, 2018

Candidates should bring only approved references in the condition allowed by current testing rules. Before exam day, review testing policies for book condition, tabs, highlighting, handwritten notes, loose papers, inserted pages, and other materials. Even when an exam is open book, testing rules determine what materials may be used during the exam.

Reference preparation should be part of your study routine. Candidates should know where major plumbing and gas chapters are located, how each index is organized, and how to move between definitions, tables, and code sections. Familiarity with both references can reduce stress and save time during the exam.

Test Information and Study Materials

The G27-N exam requires a strong understanding of plumbing systems and fuel gas systems. Candidates should study the International Plumbing Code with attention to how plumbing requirements are organized. General regulations and definitions establish the foundation for code compliance, while later chapters address fixtures, water heaters, water distribution, drainage, vents, traps, interceptors, separators, storm drainage, and other plumbing system requirements.

For plumbing fixtures, candidates should review fixture requirements, fixture connections, clearances, installation provisions, indirect waste conditions, and related system requirements. Fixture questions may depend on the type of fixture, its location, the connected system, or a specific installation condition.

For water supply and distribution, candidates should study pipe sizing concepts, fixture supply requirements, backflow protection, valves, pressure considerations, materials, distribution layout, and system installation. Tables and sizing provisions are important because many water distribution questions require careful code application.

For sanitary drainage, candidates should review drainage fixture units, pipe sizing, slope, cleanouts, horizontal drainage, vertical stacks, branch connections, offsets, and system layout. Drainage questions often require attention to measurements, fixture units, pipe arrangement, and code tables.

For venting, candidates should study vent types, vent sizing, vent connections, vent terminals, wet venting, distance limitations, and special venting arrangements. Venting is a major plumbing exam area because small layout differences can change the requirement that applies.

For traps, interceptors, and separators, candidates should review trap seal requirements, prohibited trap arrangements, cleanout access, grease interceptors, oil separators, indirect waste, and special fixture or system conditions. These topics often require both code definitions and installation rules.

For storm drainage, candidates should review roof drainage, storm system sizing, secondary drainage, conductors, leaders, and related provisions. Storm drainage questions may involve tables, rainfall rates, roof areas, or drainage system layout.

For gas piping, candidates should study the International Fuel Gas Code carefully. Important areas include gas piping materials, pipe sizing, developed length, appliance input, fittings, valves, regulators, sediment traps, pressure testing, leak detection, protection of piping, appliance connections, combustion air, chimneys, vents, vent connectors, and termination requirements.

Gas piping questions may require careful table use. Candidates should practice identifying gas type, system pressure, developed length, appliance load, branch arrangement, and the correct sizing method. Because sizing questions can take more time than direct lookup questions, practice with tables is an important part of preparation.

Plan reading is also important for master-level plumbing with gas preparation. Candidates should practice reading plumbing layouts, riser diagrams, pipe sizes, fixture locations, vent arrangements, drainage paths, gas piping routes, appliance connections, and notes. Plan-reading questions may require candidates to interpret the drawing first and then apply the correct code requirement.

Good preparation includes repeated practice with the actual references. Use the table of contents to understand each book’s structure. Use the index to find terms quickly. Review definitions often. Practice using tables carefully and reading all notes, exceptions, and footnotes. Build the habit of checking the full requirement before selecting an answer.

Timed practice is also important. Some questions may be answered quickly, while others may require code lookup, table interpretation, or careful comparison between plumbing and fuel gas provisions. Practicing under timed conditions helps candidates learn when to keep moving and when to return to a difficult question later.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps candidates prepare for the ICC Master Plumber w/Gas G27-N exam with organized study guidance, plumbing and gas-focused review, practice-oriented preparation, and reference-navigation support. The course is designed to help you approach the International Plumbing Code, 2018 and International Fuel Gas Code, 2018 with a clearer study plan.

For many candidates, the most difficult part of preparation is knowing where to focus. The approved references contain a large amount of technical information, and reading without structure can be overwhelming. 1 Exam Prep helps organize review around major exam areas, including general regulations, fixtures, water heaters, water supply and distribution, sanitary drainage, vents, traps, interceptors, separators, storm drainage, gas piping, combustion air, chimneys, and vents.

Because the G27-N exam is open book, the ability to navigate both references is essential. 1 Exam Prep supports candidates by helping them become more comfortable locating information, recognizing code terms, working with tables, and applying requirements to exam-style questions. This kind of preparation can help reduce confusion and build confidence before test day.

The course also helps candidates connect field experience with code-based testing. A plumbing or gas professional may understand how systems are installed, but the exam requires answers supported by the approved code references. 1 Exam Prep helps reinforce that connection through structured review and practical exam preparation.

1 Exam Prep does not guarantee passing, licensing approval, state approval, or exam outcomes. Candidates still need to study, practice, register properly, and follow the licensing requirements of their jurisdiction. The value of the course is in giving candidates a more organized path toward exam readiness.

FAQ Section

What is the ICC Master Plumber w/Gas G27-N exam?

The ICC G27-N exam is a National Standard Master Plumber with Gas exam that evaluates plumbing and fuel gas code knowledge, including plumbing fixtures, water supply, drainage, venting, traps, storm drainage, gas piping, combustion air, chimneys, and vents.

Is the G27-N exam open book?

Yes. The G27-N exam is an open book exam. Candidates should prepare by learning how to use the International Plumbing Code, 2018 and International Fuel Gas Code, 2018 quickly and accurately during the timed test.

What books are used for this exam prep course?

The references listed for this course are the International Plumbing Code, 2018 and the International Fuel Gas Code, 2018.

Does this online exam prep include the code books?

This product title identifies the item as online exam prep. Books should only be considered included when the product purchase option specifically states that books are included.

What topics should I study for the G27-N exam?

Important study topics include general regulations, plumbing fixtures, water heaters, water supply and distribution, sanitary drainage, plumbing vent requirements, traps, interceptors, separators, storm drainage, gas piping, combustion air, chimneys, vents, and plan reading.

Can passing the G27-N exam get me licensed?

Passing the G27-N exam may satisfy a testing requirement in some jurisdictions, but licensing approval depends on the state, county, city, or local licensing authority. Candidates should confirm all licensing requirements before registering for the exam.

Who should take this online exam prep course?

This course is intended for candidates preparing for the ICC Master Plumber w/Gas G27-N exam, including experienced plumbers, gas piping professionals, supervisors, contractors, and license candidates who need structured exam preparation.

How should I prepare for an open book master plumber with gas exam?

Study both approved references, learn each book’s layout, practice using the table of contents and index, review definitions, work with sizing tables, complete plan-reading practice, and use timed practice to improve speed and accuracy.

Why is the International Fuel Gas Code important for this exam?

The International Fuel Gas Code, 2018 supports the gas portion of the exam. It includes requirements for gas piping, appliance connections, pipe sizing, combustion air, chimneys, vents, regulators, valves, testing, and safety provisions.

Why choose 1 Exam Prep for G27-N exam preparation?

1 Exam Prep provides organized online study support for candidates preparing for the ICC Master Plumber w/Gas G27-N exam. The course helps reinforce plumbing code knowledge, fuel gas code knowledge, reference navigation, table use, plan-reading preparation, and confidence-building exam study.