Arizona Plumbing, Including Solar Residential Contractor Exam (R-37) Book Package

Prepare for the Arizona Plumbing, Including Solar Residential Contractor Exam (R-37) with a complete book package covering residential plumbing, fuel gas, mechanical systems, fire sprinklers, construction safety, onsite wastewater treatment, pipe-trade mathematics, boilers, hydronic heating, excavation practices, and solar water and pool heating.

The Arizona R-37 examination uses an extensive reference library. Candidates may need to move between plumbing codes, fuel gas requirements, mechanical provisions, sprinkler standards, safety regulations, Arizona-specific materials, technical handbooks, and solar heating guidance. Purchasing the references as one coordinated package gives candidates a practical foundation for organized study and open-book exam preparation.

This package is designed for experienced plumbers, qualifying parties, supervisors, solar thermal professionals, business owners, and tradespeople pursuing the Arizona R-37 residential contractor classification. It is also useful for candidates who understand plumbing work but need the specific books associated with the exam.

The R-37 classification includes residential plumbing and solar applications. Preparation may involve water and gas piping, plumbing fixtures, drainage and vent systems, sewage treatment systems, fire-protection systems, boilers, hydronic heating, construction safety, excavation, utility-location procedures, solar water heating, and solar pool heating.

Studying with the actual reference books helps candidates learn how each publication is organized. Tables of contents, indexes, definitions, code sections, formulas, diagrams, appendices, exceptions, and technical tables all play an important role in an open-book examination. Regular use of the books can help candidates develop a faster and more deliberate reference-navigation method.

What You Get

This product includes the books and publications identified on this page. Online course access, book highlighting, tabs, rentals, application services, and other preparation products are not included unless they are specifically added to the order.

Exam Details

The Arizona R-37 Plumbing, Including Solar residential trade examination contains 100 questions. Candidates are allowed 240 minutes to complete the examination, and a minimum score of 70 percent is required to pass.

The classification covers the installation and repair of water and gas piping systems, fire-protection systems, sewage treatment systems, fixtures, vents, devices common to the plumbing industry, and solar applications. The scope also includes the work covered by the R-37R residential plumbing subclassifications.

Exam preparation may include drainage, waste and vent systems, indirect waste, water supply, backflow prevention, roof drains, storm drainage, plumbing fixtures, water heaters, accessibility, general regulations, interceptors, traps, isometric analysis, fuel gas, septic and sewer systems, residential fire sprinklers, excavation, hydronic heating, boilers, and solar thermal systems.

Questions may require candidates to locate a code provision, interpret a definition, use a sizing table, identify a permitted material, evaluate a piping arrangement, perform a calculation, recognize a safety requirement, or determine which technical standard applies to a particular situation.

Solar questions may involve solar energy concepts, collectors, storage, piping, circulation, controls, system configurations, heat transfer, solar water heating, solar pool heating, installation practices, operation, and maintenance.

Candidates should practice recognizing the subject of each question before opening a book. Selecting the correct reference quickly can reduce unnecessary searching and leave more time for interpreting requirements, completing calculations, and reviewing answers.

Open Book Test

The Arizona Plumbing, Including Solar Residential Contractor R-37 examination is an open-book test. Candidates may use approved reference materials during the examination under the testing provider’s current rules.

Open-book testing does not eliminate the need for preparation. The reference library contains numerous detailed publications, and candidates may not have enough time to search every book for every answer. Effective preparation combines trade knowledge with familiarity with the books.

Begin by learning the purpose of each reference. The International Plumbing Code supports many questions involving water distribution, sanitary drainage, waste and vent systems, plumbing fixtures, traps, storm drainage, indirect waste, water heaters, materials, inspections, and testing.

The International Fuel Gas Code supports fuel gas piping, demand, sizing, appliance connections, shutoff valves, regulators, combustion air, venting, and testing. The International Mechanical Code addresses mechanical equipment, ventilation, exhaust, combustion air, hydronic systems, and related installations.

NFPA 13, NFPA 13D, and NFPA 13R apply to different sprinkler-system conditions. Candidates should understand the scope of each standard so they can select the appropriate reference based on the occupancy and system described.

The OSHA construction regulations support safety questions, while the Arizona Administrative Code material addresses onsite wastewater provisions. The remaining trade references provide information about calculations, piping, boilers, hydronic heating, underground utilities, and solar thermal systems.

Candidates should review the current examination rules before preparing their books. Requirements may address binding, tabs, highlighting, handwritten notes, attachments, inserts, and loose materials.

Licensing Steps

Begin by confirming that the R-37 Plumbing, Including Solar residential classification matches the contracting work the applicant or business intends to perform. Arizona offers separate residential, commercial, and dual classifications, so applicants should select the classification that corresponds with their planned scope of work.

Identify the qualifying party for the license. The qualifying party is responsible for meeting the applicable experience, knowledge, and examination requirements associated with the requested classification.

Complete the R-37 trade examination unless an authorized waiver applies. The qualifying party may also need to complete the applicable Arizona Statutes and Rules requirement as part of the contractor licensing process.

Complete the required background checks and gather the documents associated with the applicant’s business structure. Arizona contractor licenses may be issued to eligible business entities, including sole proprietorships, partnerships, limited liability companies, and corporations.

Obtain the required contractor bond and prepare the application documents. Supporting materials may include identification, business formation records, qualifying-party information, examination results, experience documentation, background-check records, bond paperwork, disclosures, and signed forms.

Because the R-37 classification includes solar work, the applicant must submit the applicable solar warranty documentation with the license application.

Submit the completed application to the Arizona Registrar of Contractors. The agency reviews the application and supporting documents before determining whether the license can be issued. Passing the examination is one part of the licensing process and does not automatically provide a contractor license.

State Requirements

Arizona contractor licensing is administered by the Arizona Registrar of Contractors. Applicants must satisfy the requirements associated with the requested classification, qualifying party, relevant experience, required examinations or authorized waivers, background checks, contractor bond, business documentation, and license application.

The R-37 classification applies to residential plumbing, including solar work, within its established scope. It should not automatically be treated as authorization for commercial plumbing or contracting work outside the residential classification.

The qualifying party should have experience relevant to the plumbing and solar work covered by the license. Applicants should maintain accurate records describing employment, projects, duties, supervision, installation work, repairs, and hands-on trade responsibilities.

Business names, ownership information, identification records, bond documents, background-check materials, and qualifying-party details should remain consistent throughout the application. Missing or conflicting information may delay the state review process.

Applicants for a license classification that includes solar work must submit a copy of the applicable solar warranty. Current forms and instructions should be used when completing the licensing process.

Reference Books

• Included Book: Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  Covers federal construction-safety requirements involving excavation, ladders, scaffolds, personal protective equipment, fall protection, electrical hazards, material handling, and general jobsite practices.
• Included Book: International Fuel Gas Code, 2018
  Addresses fuel gas piping, system sizing, appliance connections, regulators, shutoff valves, combustion air, venting, testing, and installation requirements.
• Included Book: International Mechanical Code, 2018
  Provides requirements for mechanical equipment, ventilation, exhaust, combustion air, hydronic systems, appliances, and related installations.
• Included Book: International Plumbing Code, 2018
  Covers plumbing fixtures, water supply, sanitary drainage, vents, traps, storm drainage, indirect waste, water heaters, materials, inspections, and testing.
• Included Book: NFPA 13: Installation of Sprinkler Systems, 2019
  Provides requirements for automatic sprinkler systems, including components, piping, installation, water supplies, inspection, and testing.
• Included Book: NFPA 13D - Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes, 2019
  Addresses sprinkler systems installed in one- and two-family dwellings and manufactured homes.
• Included Book: NFPA 13R - Sprinkler Systems for Residential Occupancies up to and Including Four Stories in Height, 2019
  Covers qualifying residential sprinkler systems, including system components, installation, design considerations, and water-supply provisions.
• Included Book: On-site Wastewater Treatment Facility Provisions in Unified Water Quality Permit Rule, Arizona Administrative Code Title 18, Chapter 9, 2006
  Contains Arizona provisions related to onsite wastewater treatment facilities and associated wastewater-disposal requirements.
• Included Book: Mathematics for Plumbers and Pipefitters, 8th Edition
  Supports calculations involving measurements, conversions, areas, volumes, offsets, angles, slopes, pressure, capacity, and practical piping applications.
• Included Book: IPT’s Pipe Trades Handbook, Robert A. Lee, 2016
  Provides formulas, tables, fitting information, measurements, layout guidance, materials, and practical pipe-trade data.
• Included Book: Boiler Operator’s Guide, 5th Edition
  Explains boiler components, controls, combustion, operation, maintenance, water treatment, safety, and troubleshooting principles.
• Included Book: Arizona 811 - Arizona Blue Stake Brochure
  Provides Arizona safe-digging and underground utility-location guidance for excavation and trenching work.
• Included Book: Modern Hydronic Heating for Residential and Light Commercial Buildings, John Siegenthaler, P.E., 2022
  Covers hydronic system design, boilers, piping arrangements, heat emitters, circulators, controls, zoning, radiant heating, and system performance.
• Included Book: Solar Water and Pool Heating Design and Installation Manual
  Covers solar thermal principles, collectors, storage, system design, piping, circulation, controls, installation, solar water heating, solar pool heating, operation, and maintenance.

Test Information and Study Materials

Organize preparation by subject. Begin with plumbing fundamentals, including drainage, venting, water supply, fixtures, traps, water heaters, storm drainage, and indirect waste. Practice finding relevant definitions, installation requirements, and sizing tables in the International Plumbing Code.

Review fuel gas piping, system demand, sizing, appliance connections, combustion air, regulators, shutoff valves, venting, and testing. Study mechanical equipment, ventilation, exhaust, boilers, hydronic components, and related residential systems.

Compare NFPA 13, NFPA 13D, and NFPA 13R carefully. Learn which buildings and sprinkler applications fall within the scope of each standard. Practice identifying the correct reference before searching for a detailed requirement.

Safety review should include excavation, protective systems, access and egress, spoil placement, ladders, scaffolds, personal protective equipment, electrical hazards, and underground utility-location procedures.

Complete calculations involving measurements, conversions, areas, volumes, slopes, offsets, pressure, capacity, pipe sizing, flow, and system performance. Use the mathematics and pipe-trade references to reinforce formulas and calculation methods.

Solar preparation should include solar thermal principles, collector types, storage, heat transfer, piping arrangements, circulation, pumps, controls, solar water-heating systems, pool-heating applications, installation procedures, and system maintenance.

Complete timed practice sessions with the full reference set. Track which books take the longest to navigate and which subjects produce repeated errors. Use those results to focus future review.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps candidates organize the Arizona R-37 preparation process with a complete reference package covering residential plumbing, fuel gas, mechanical systems, fire sprinklers, wastewater, safety, boilers, hydronic heating, mathematics, utility-location practices, and solar thermal applications.

The coordinated book package eliminates the need to locate every listed reference separately. Candidates can build their study plan around the actual publications associated with the examination and develop familiarity with the complete technical library.

Reference-navigation practice helps candidates learn how to use tables of contents, indexes, definitions, chapter headings, formulas, diagrams, technical tables, exceptions, and cross-references. This is essential for an open-book examination involving numerous publications.

Trade-focused review encourages candidates to connect code provisions and technical information with practical plumbing and solar applications. Practice-oriented preparation can help identify weaker subjects, improve calculation skills, and create a more consistent exam strategy.

1 Exam Prep supports an organized, confidence-building study structure. The books provide the technical foundation candidates need to review the trade, practice reference navigation, and prepare for the Arizona R-37 examination.

Frequently Asked Questions

What is included in the Arizona R-37 book package?

The package includes all plumbing, fuel gas, mechanical, NFPA, OSHA, Arizona wastewater, mathematics, pipe-trade, boiler, utility-location, hydronic heating, and solar references listed on this page.

Is the Arizona R-37 examination open book?

Yes. The R-37 trade examination is open book, subject to the current testing rules for approved references and permitted book preparation.

How many questions are on the R-37 exam?

The examination contains 100 questions.

How much time is allowed?

Candidates are allowed 240 minutes to complete the examination.

What score is required to pass?

A minimum score of 70 percent is required to pass.

Does this package include solar study material?

Yes. The package includes the Solar Water and Pool Heating Design and Installation Manual along with plumbing, mechanical, hydronic heating, and related references.

Does the package include an online course?

No. This product includes the listed reference books only. Course access is not included unless it is purchased separately.

Are the books highlighted and tabbed?

No. This product is described as a standard book package. Highlighting and tabs are not included unless they are specifically selected as part of another package.

Should I study with the books before exam day?

Yes. Regular practice helps candidates learn how each publication is organized, identify useful index terms, locate technical tables, and improve open-book navigation.

Does passing the exam automatically issue the contractor license?

No. Passing the examination is one part of the licensing process. Applicants must also satisfy the applicable qualifying-party, experience, background-check, bonding, solar documentation, business, and application requirements.

Does purchasing the books guarantee a passing score?

No. The books provide the technical references needed for study and exam use, but results depend on the candidate’s knowledge, preparation, navigation skills, and examination performance.