Arizona Plumbing Commercial Contractor (C-37) Books Allowed into Exam Package

The Arizona Plumbing Commercial Contractor (C-37) Books Allowed into Exam Package is designed for candidates preparing for the Arizona C-37 Plumbing commercial contractor trade exam who need the approved exam-room references in one organized package. This package includes the books provided for this exam-room reference set: Code of Federal Regulations - 29 CFR Part 1926 (OSHA), International Fuel Gas Code, 2018, International Mechanical Code, 2018, International Plumbing Code, 2018, NFPA 13: Installation of Sprinkler Systems, 2019, NFPA 13D - Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes, 2019, and NFPA 13R - Sprinkler Systems for Residential Occupancies up to and Including Four Stories in Height, 2019.

The Arizona C-37 Plumbing Commercial Contractor classification is for commercial plumbing work, including installation, alteration, and repair of plumbing systems and related equipment within the scope of the license. Candidates preparing for this exam should be ready to study plumbing code, fuel gas systems, mechanical coordination, piping materials, drainage, venting, water supply, fixtures, traps, interceptors, backflow prevention, sprinkler system references, jobsite safety, and general commercial construction practices.

This books allowed into exam package focuses on the references that may be brought into the examination center for the Arizona C-37 plumbing commercial contractor exam. Open-book testing gives candidates access to approved references, but it does not remove the need for serious preparation. Candidates still need to understand plumbing systems, read code language carefully, recognize trade terminology, and locate information quickly during a timed exam.

The International Plumbing Code, 2018 supports preparation for commercial plumbing code topics, including fixtures, water supply, sanitary drainage, venting, traps, interceptors, storm drainage, backflow protection, materials, joints, and installation requirements. The International Fuel Gas Code, 2018 supports preparation for gas piping, appliances, combustion air, venting, shutoff valves, sizing concepts, and testing requirements. The International Mechanical Code, 2018 supports preparation for mechanical coordination, equipment, ventilation, exhaust, combustion air relationships, and mechanical system requirements that may intersect with plumbing work.

The included NFPA references support preparation for sprinkler-related code material. NFPA 13: Installation of Sprinkler Systems, 2019 covers sprinkler system installation requirements for many building types. NFPA 13D, 2019 focuses on sprinkler systems in one- and two-family dwellings and manufactured homes. NFPA 13R, 2019 focuses on sprinkler systems for residential occupancies up to and including four stories in height. The Code of Federal Regulations - 29 CFR Part 1926 (OSHA) supports construction safety preparation for plumbing work, including excavation, ladders, tools, personal protective equipment, hazard communication, material handling, and general jobsite safety.

Commercial plumbing contractors often work on complex projects that require coordination with other trades, strict code compliance, and careful installation practices. A candidate may have strong field experience but still need exam-focused preparation because licensing exams often use precise code language, timed question formats, and reference-based lookup tasks. Studying with the approved books helps candidates build familiarity with the same materials they will rely on during the open-book exam.

Exam Details

The Arizona Plumbing Commercial Contractor (C-37) trade exam is part of the Arizona contractor licensing process. The exam is administered through PSI for the Arizona Registrar of Contractors. The reference material listed for the examination is used to prepare exam questions, and the exam may also include questions based on trade knowledge and general industry practices.

The Arizona C-37 trade exam contains 100 questions. The minimum passing score is 70%, and the time allowed is 240 minutes. Candidates should manage time carefully because the exam covers a broad range of commercial plumbing, fuel gas, mechanical, sprinkler, and safety subjects. With 100 questions in 240 minutes, candidates have a little over two minutes per question on average.

The exam may include plumbing code questions, fuel gas questions, mechanical coordination questions, pipe sizing and installation concepts, water supply, drainage, venting, fixtures, traps, backflow prevention, storm drainage, sprinkler system references, jobsite safety, and general commercial plumbing practices. Some questions may be answered from trade knowledge, while others may require locating the correct section in one of the approved references.

For code questions, candidates should use the exact code editions listed for the examination. This package includes the International Fuel Gas Code, 2018, International Mechanical Code, 2018, International Plumbing Code, 2018, NFPA 13, 2019, NFPA 13D, 2019, and NFPA 13R, 2019. Safety-related questions may be supported by Code of Federal Regulations - 29 CFR Part 1926 (OSHA).

Candidates may use a silent, nonprinting, non-programmable calculator in the examination center. Approved references should be organized before test day with permitted highlighting, underlining, annotations, indexing, and permanent tabs. Candidates should bring only approved references and follow all testing center rules for book condition, tabs, notes, and binding.

Open Book Test

The Arizona Plumbing Commercial Contractor (C-37) trade exam is an open-book test with specific rules for approved references. This package includes the books allowed into the examination center for the Arizona C-37 books allowed into exam package: Code of Federal Regulations - 29 CFR Part 1926 (OSHA), International Fuel Gas Code, 2018, International Mechanical Code, 2018, International Plumbing Code, 2018, NFPA 13: Installation of Sprinkler Systems, 2019, NFPA 13D - Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes, 2019, and NFPA 13R - Sprinkler Systems for Residential Occupancies up to and Including Four Stories in Height, 2019.

Candidates are responsible for bringing their own approved references to the examination center. Reference materials may be highlighted, underlined, annotated, and indexed before the examination session. During the examination session, candidates may not write, highlight, underline, or index in the references.

Permanent tabs are allowed. Temporary tabs, including Post-it style tabs or other removable tabs that can be removed without tearing the page, are not allowed and must be removed before the exam begins. Candidates may not bring additional papers, whether loose or attached, with the approved references.

Downloaded reference materials may be brought into the testing center when properly bound. Spiral binding or a hole-punched binder format may be used when permitted by testing rules. Book preparation should be completed before the exam appointment so the candidate can focus on answering questions instead of correcting reference problems at the testing center.

Open-book preparation should include regular practice with tables of contents, indexes, definitions, chapter headings, code tables, sizing tables, and safety standards. The IPC, IFGC, IMC, NFPA standards, and OSHA reference are detailed technical books. A clean permanent tabbing system and repeated lookup practice can help candidates move through the exam more efficiently.

Licensing Steps

Arizona contractor licensing is handled through the Arizona Registrar of Contractors. Candidates pursuing the Arizona C-37 Plumbing Commercial Contractor license should begin by confirming that this classification matches the commercial plumbing work they plan to advertise, contract for, supervise, and perform.

The qualifying party is the person who qualifies the license by meeting the knowledge, experience, and examination requirements for the classification. For many applicants, the qualifying party must complete the required trade exam and the Arizona Statutes and Rules requirement unless an approved waiver applies.

Common licensing steps include selecting the correct license classification, identifying the qualifying party, completing the required examination or approved waiver process, meeting the Arizona Statutes and Rules requirement when required, forming or registering the business entity when applicable, obtaining the required bond, completing background checks for required individuals, providing government-issued identification, and submitting the completed license application with required documents and fees.

Applicants using an LLC or corporation should make sure the business entity is properly formed or registered before submitting the contractor license application. The legal business name should match across entity records, bond documents, application paperwork, and future advertising. Consistent documentation helps reduce delays during application review.

Passing the trade exam is an important step, but it does not automatically issue the contractor license. Applicants must complete the full Arizona Registrar of Contractors application process and meet all licensing requirements for the classification. Candidates should prepare for the exam while also staying organized with business records, bond information, background checks, identification, and application paperwork.

State Requirements

The Arizona C-37 Plumbing Commercial Contractor classification is a commercial plumbing classification. It is intended for commercial plumbing work within the limits of the license, including installation, alteration, and repair of plumbing systems and related components covered by the classification.

Commercial plumbing work may include piping systems, fixtures, drainage systems, vent systems, water supply systems, fuel gas connections, storm drainage, backflow prevention, interceptors, equipment connections, and coordination with building systems. Contractors should understand the classification scope carefully and avoid contracting for work outside the authorized license.

Arizona issues separate classifications for commercial work, residential work, and dual classifications that may cover both commercial and residential work for particular trades. The C-37 classification is commercial. Contractors who need authority for residential plumbing work or combined residential and commercial work should make sure they select the proper classification for the work they intend to perform.

Some commercial plumbing projects may require coordination with other properly licensed contractors when work involves electrical systems, mechanical systems, fire protection systems, excavation, structural work, specialty equipment, or other work outside the C-37 scope. Understanding the boundaries of the classification is part of responsible contracting and licensing compliance.

Arizona contractor applicants should also prepare for requirements related to the qualifying party, examination completion, Arizona Statutes and Rules requirements, background checks, bonding, business formation or registration when applicable, identification, application forms, and fees. The Arizona Registrar of Contractors reviews the completed application before issuing the license.

Reference Books

• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  This construction safety reference covers OSHA standards for construction work. It supports preparation for safety topics that may apply to commercial plumbing projects, including excavation safety, ladders, scaffolds, personal protective equipment, hazard communication, tools, materials handling, trenching, and general jobsite safety requirements.
• International Fuel Gas Code, 2018
  This fuel gas code reference supports preparation for gas piping, appliance installation, combustion air, venting, shutoff valves, pressure testing, sizing concepts, gas-fired equipment, and fuel gas system safety.
• International Mechanical Code, 2018
  This mechanical code reference supports preparation for mechanical equipment, ventilation, exhaust systems, combustion air coordination, appliance installation, piping-related provisions, and mechanical system requirements that may intersect with commercial plumbing work.
• International Plumbing Code, 2018
  This plumbing code reference supports preparation for fixtures, water supply, sanitary drainage, venting, traps, interceptors, storm drainage, backflow protection, materials, joints, pipe installation, and commercial plumbing code navigation.
• NFPA 13: Installation of Sprinkler Systems, 2019
  This sprinkler system reference supports preparation for sprinkler installation requirements, system components, water supplies, pipe arrangement, spacing concepts, design-related provisions, installation practices, and inspection-related sprinkler system topics.
• NFPA 13D - Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes, 2019
  This sprinkler system reference supports preparation for sprinkler systems in one- and two-family dwellings and manufactured homes, including system arrangement, water supply concepts, installation requirements, components, and residential fire sprinkler provisions.
• NFPA 13R - Sprinkler Systems for Residential Occupancies up to and Including Four Stories in Height, 2019
  This sprinkler system reference supports preparation for sprinkler systems in residential occupancies up to and including four stories in height, including installation requirements, system components, design concepts, water supply considerations, and residential occupancy sprinkler provisions.

Exam Room Approved Books

The following books are included in this Arizona Plumbing Commercial Contractor (C-37) Books Allowed into Exam Package and are the exam-room approved references for this package:

• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  Allowed exam-room safety reference used for OSHA construction standards and safety-related exam preparation.
• International Fuel Gas Code, 2018
  Allowed exam-room fuel gas code reference used for gas piping, appliances, venting, combustion air, testing, and fuel gas code preparation.
• International Mechanical Code, 2018
  Allowed exam-room mechanical code reference used for mechanical coordination, equipment, ventilation, combustion air, and mechanical system preparation.
• International Plumbing Code, 2018
  Allowed exam-room plumbing code reference used for water supply, drainage, venting, fixtures, traps, storm drainage, backflow prevention, and commercial plumbing preparation.
• NFPA 13: Installation of Sprinkler Systems, 2019
  Allowed exam-room sprinkler system reference used for sprinkler installation requirements and system preparation.
• NFPA 13D - Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes, 2019
  Allowed exam-room sprinkler system reference used for one- and two-family dwelling and manufactured home sprinkler system preparation.
• NFPA 13R - Sprinkler Systems for Residential Occupancies up to and Including Four Stories in Height, 2019
  Allowed exam-room sprinkler system reference used for residential occupancy sprinkler systems up to and including four stories in height.

These books should be prepared according to exam rules before test day. Highlighting, underlining, annotations, and indexing may be completed before the exam session. Permanent tabs may be used. Temporary removable tabs, loose notes, and extra attached papers are not allowed. Candidates should keep their references clean, organized, and compliant for inspection at the examination center.

Test Information and Study Materials

The Arizona C-37 exam covers commercial plumbing code, fuel gas systems, mechanical coordination, sprinkler references, construction safety, and practical plumbing trade knowledge. A strong study plan should follow the exam content and give attention to each major reference. Candidates should avoid studying only the areas they perform most often in the field.

For plumbing code, candidates should work directly with the 2018 International Plumbing Code. Study should include fixtures, fixture counts, water distribution, sanitary drainage, vent systems, traps, cleanouts, interceptors, storm drainage, backflow prevention, materials, joints, supports, and installation requirements. The IPC is a core reference for this exam package.

For fuel gas, candidates should review the 2018 International Fuel Gas Code. Important topics include gas piping materials, pipe sizing concepts, appliance connections, shutoff valves, pressure testing, combustion air, venting, gas-fired equipment, and safety requirements. Fuel gas questions may require careful reading of tables, definitions, and installation provisions.

For mechanical coordination, candidates should study the 2018 International Mechanical Code. Commercial plumbing work can intersect with mechanical equipment, combustion air, ventilation, exhaust systems, appliances, and coordinated building systems. A contractor who understands how plumbing and mechanical systems relate can approach these questions with stronger context.

For sprinkler system references, candidates should become familiar with NFPA 13, NFPA 13D, and NFPA 13R. These references are detailed technical standards, so candidates should practice navigating chapter headings, tables, definitions, system types, installation requirements, and component-related provisions. Sprinkler-related questions may require knowing which standard applies to a particular system or occupancy type.

For jobsite safety, candidates should work directly with OSHA 29 CFR Part 1926. Commercial plumbing work may involve trenching, excavation, ladders, scaffolds, confined work areas, material handling, cutting tools, power tools, personal protective equipment, hazard communication, and work around other trades. Safety preparation supports both exam readiness and responsible jobsite practice.

For commercial plumbing installation, candidates should review pipe layout, pipe supports, hangers, sleeves, penetrations, valves, pumps, fixtures, equipment connections, testing, inspection preparation, water pressure, drainage slope, venting, and system troubleshooting. Practical installation knowledge helps candidates answer trade-based questions that may not be direct code lookups.

For exam preparation, candidates should organize the approved books with permanent tabs, practice using indexes, learn common chapter locations, and complete timed lookup practice. With seven references in the package, organization matters. Candidates should know which book is most likely to contain the answer before searching, rather than flipping through every reference during the exam.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps Arizona contractor candidates prepare with organized study guidance, trade-focused review, and practical reference navigation. For the Arizona Plumbing Commercial Contractor (C-37) exam, preparation should be built around the approved references, the exam content, and the ability to answer questions under timed conditions.

Open-book exams reward candidates who know how to use their books. 1 Exam Prep encourages candidates to study with the same references they will use on exam day, build familiarity with OSHA, IFGC, IMC, IPC, and NFPA materials, and practice locating information quickly. A clear book strategy can help reduce stress and improve pacing during the exam.

Many plumbing professionals bring valuable field experience to the licensing process, but exam questions are not always written like jobsite conversations. Questions may require careful reading, reference navigation, code lookup, safety standard review, sprinkler standard awareness, fuel gas knowledge, mechanical coordination, or understanding of classification limits. 1 Exam Prep helps students bridge the gap between real-world commercial plumbing experience and exam-focused preparation.

This books allowed into exam package gives candidates the approved references needed for the Arizona C-37 exam-room reference set. When combined with consistent study habits, permanent tab preparation, timed lookup practice, and a clear understanding of the licensing process, these references can help candidates move toward their Arizona Plumbing Commercial Contractor licensing goal with greater confidence and structure.

FAQ: What books are included in the Arizona C-37 Books Allowed into Exam Package?

This package includes OSHA 29 CFR Part 1926, 2018 International Fuel Gas Code, 2018 International Mechanical Code, 2018 International Plumbing Code, NFPA 13 2019, NFPA 13D 2019, and NFPA 13R 2019.

FAQ: Is the Arizona C-37 Plumbing Commercial exam open book?

Yes. The Arizona C-37 trade exam is open book with specific rules for approved references. Candidates must follow the testing rules for highlighting, annotations, indexing, tabs, binding, and prohibited materials.

FAQ: How many questions are on the Arizona C-37 exam?

The Arizona C-37 trade exam has 100 questions. The minimum passing score is 70%, and the time allowed is 240 minutes.

FAQ: Can I bring loose notes into the exam?

No. Loose papers and additional attached papers are not allowed with the approved references. Book preparation should be completed directly in the approved references before exam day.

FAQ: Are temporary tabs allowed in the exam books?

No. Temporary removable tabs, including Post-it style tabs, are not allowed. Permanent tabs may be used when they are the type that would tear the page if removed.

FAQ: Why is the 2018 International Plumbing Code included?

The 2018 International Plumbing Code is included as a core plumbing code reference for fixtures, water supply, drainage, venting, traps, storm drainage, backflow prevention, materials, joints, and commercial plumbing installation requirements.

FAQ: Why are the 2018 Fuel Gas Code and Mechanical Code included?

The 2018 International Fuel Gas Code supports preparation for gas piping, appliances, combustion air, venting, and testing. The 2018 International Mechanical Code supports preparation for mechanical coordination, equipment, ventilation, combustion air, and related system requirements.

FAQ: Why are NFPA 13, NFPA 13D, and NFPA 13R included?

These NFPA references support sprinkler system preparation. NFPA 13 covers sprinkler systems generally, NFPA 13D covers one- and two-family dwellings and manufactured homes, and NFPA 13R covers residential occupancies up to and including four stories in height.

FAQ: Does passing the trade exam automatically issue the Arizona C-37 license?

No. Passing the trade exam is only one part of the licensing process. Applicants must complete the Arizona Registrar of Contractors application process and meet all licensing requirements for the classification.

FAQ: How should I study with this books allowed into exam package?

Study the exam content, learn the structure of the OSHA, IFGC, IMC, IPC, and NFPA references, add permitted permanent tabs before exam day, and practice timed lookups. With several references in this package, candidates should practice choosing the right book quickly before searching for the answer.