The 1 Package: All-Inclusive Arizona Plumbing Residential / Commercial Contractor (CR-37) Exam, Licensing & Business Setup Solution

Prepare for the Arizona Plumbing Residential / Commercial Contractor CR-37 exam while building the licensing and business foundation needed to operate professionally. The 1 Package combines plumbing exam preparation, an extensive technical reference library, contractor application assistance, business formation, EIN filing, and contractor compliance guidance in one coordinated solution.

This all-inclusive Arizona CR-37 contractor package is designed for experienced plumbers, pipefitters, plumbing supervisors, hydronic-system professionals, qualifying parties, project managers, service contractors, and business owners pursuing authority to perform qualifying residential and commercial plumbing work in Arizona.

The CR-37 classification combines the applicable Arizona residential and commercial plumbing scopes. Candidates should prepare for a broad range of plumbing subjects, including potable water distribution, sanitary drainage, venting, fixtures, traps, interceptors, fuel-gas piping, mechanical systems, boilers, hydronic heating, fire-sprinkler provisions, on-site wastewater requirements, excavation safety, utility-location procedures, and trade mathematics.

Professional plumbing work requires more than knowing how to assemble pipe and fittings. Contractors must understand system design, approved materials, sizing methods, pressure, flow, drainage slope, venting, backflow protection, equipment connections, testing, inspections, and the relationship between plumbing systems and the surrounding building.

The included references support preparation for residential and commercial plumbing installations. The International Plumbing Code addresses water supply, sanitary drainage, vents, fixtures, traps, interceptors, piping materials, and system testing. The International Fuel Gas Code supports fuel-gas piping, appliance connections, combustion air, pressure testing, and venting. The International Mechanical Code addresses boilers, hydronic systems, equipment, ventilation, piping, controls, and mechanical installation requirements.

The package also includes NFPA 13, NFPA 13D, and NFPA 13R for sprinkler-system preparation across commercial and residential conditions. Arizona’s on-site wastewater provisions support study involving treatment and disposal facilities, while the plumbing mathematics, pipe-trades, boiler, utility-location, and hydronic-heating references strengthen practical trade preparation.

The package includes 1 year of course access, allowing candidates to study around work schedules, active projects, service calls, and personal responsibilities. The course supports organized code review, reference navigation, plumbing calculations, practice-oriented preparation, and confidence-building study.

The 1 Package also supports the licensing and business stages that follow examination preparation. Application Service helps organize the Arizona contractor licensing process. Business Formation establishes an LLC or corporation, EIN Filing supports banking and tax administration, and Contractor Compliance Guidance helps customers understand responsibilities associated with operating an Arizona residential and commercial plumbing business.

Exam Details

The Arizona Registrar of Contractors licenses residential, commercial, and dual contractors throughout the state. The CR-37 Plumbing classification provides dual authority for qualifying plumbing work performed in residential and commercial settings.

The qualifying party is the individual whose experience, knowledge, and examination qualifications support the contractor license. This person must satisfy the applicable Arizona requirements and remain associated with the licensed business in the qualifying capacity recognized by the state.

CR-37 exam preparation may include water supply, drainage, vents, fixtures, fuel-gas systems, mechanical equipment, boilers, hydronic heating, fire-sprinkler provisions, wastewater systems, safety, utility location, estimating, and plumbing calculations.

Water-distribution preparation may involve water services, approved piping materials, fixture demand, pressure, elevation, friction loss, valves, backflow protection, water heaters, thermal expansion, insulation, supports, and testing.

Sanitary drainage and venting preparation may include building drains, building sewers, fixture drains, traps, cleanouts, vent sizing, vent connections, slope, developed length, fittings, materials, and testing procedures.

Fuel-gas preparation may involve approved materials, pipe sizing, appliance demand, shutoff valves, sediment traps, regulators, pressure testing, combustion air, equipment connections, and venting.

Mechanical and hydronic preparation may include boilers, circulating pumps, expansion tanks, air separators, heat exchangers, valves, controls, heat emitters, piping arrangements, system filling, purging, and pressure or temperature protection.

Fire-sprinkler preparation may address system types, water supplies, piping arrangements, sprinklers, valves, inspection, testing, and installation provisions. NFPA 13, NFPA 13D, and NFPA 13R apply to different building and residential occupancy conditions.

On-site wastewater preparation may involve treatment-facility provisions, disposal systems, site conditions, installation concepts, setbacks, and Arizona requirements contained in the provided administrative-code material.

Trade mathematics may include measurements, fractions, decimals, percentages, elevations, offsets, pipe length, area, volume, pressure, flow, slope, capacity, and unit conversions. Candidates should be comfortable selecting the appropriate formula or code table before completing a calculation.

OSHA preparation may include excavations, trenching, ladders, tools, electrical hazards, personal protective equipment, material handling, fall protection, housekeeping, and safe working conditions around active construction sites.

Passing the applicable examination does not automatically issue the CR-37 contractor license. The Arizona Registrar of Contractors must review and approve the complete application before the business may perform regulated work under the classification.

Open Book Test

The Arizona CR-37 plumbing trade examination is an open-book test using approved reference materials. Candidates may consult permitted books during the examination under the testing provider’s current rules regarding editions, highlighting, annotations, indexing, permanent tabs, attachments, and book inspection.

An open-book format does not eliminate the need for technical knowledge. Candidates must identify the subject of each question, choose the correct reference, locate the applicable provision, interpret the language, and apply it to the plumbing condition presented.

All books are highlighted and Tabbed. Highlighting draws attention to important plumbing provisions, fuel-gas requirements, mechanical rules, sprinkler standards, safety information, calculations, hydronic concepts, and wastewater material. Permanent tabs help candidates move among major chapters and frequently researched topics efficiently.

The references should be used throughout the course. Repeated navigation practice helps candidates become familiar with indexes, definitions, tables, diagrams, exceptions, and permanent tab locations before examination day.

A question involving water distribution, drainage, venting, fixtures, traps, or piping materials may require the International Plumbing Code. Fuel-gas questions may require the International Fuel Gas Code, while boiler and hydronic-system questions may involve the International Mechanical Code.

Sprinkler questions may require NFPA 13, NFPA 13D, or NFPA 13R depending on the type of building or system described. Excavation, ladders, tools, protective equipment, and construction-site safety may require OSHA.

The mathematics, pipe-trades, boiler, utility-location, and hydronic-heating materials strengthen broader trade preparation. Candidates should bring only the references authorized for the examination they schedule and follow all current testing-center rules.

Licensing Steps

1. Confirm the CR-37 classification. Review the residential and commercial plumbing scope to make sure it matches the services the business intends to provide.
2. Select the qualifying party. Identify the individual who will satisfy the applicable plumbing experience and examination requirements.
3. Review the examination requirements. Determine which trade and Arizona Statutes and Rules requirements apply to the proposed qualifying party.
4. Prepare for the CR-37 exam. Use the included course, highlighted and tabbed references, calculations, code-navigation exercises, and practice-oriented preparation.
5. Complete the required examination process. Pass the applicable trade examination and complete Arizona’s Statutes and Rules requirement unless an authorized waiver applies.
6. Form the business entity. Use the included Business Formation service to establish an LLC or corporation for the plumbing business.
7. Obtain an EIN. Complete the included EIN Filing with the IRS for business banking, taxation, payroll, hiring employees, and professional operations.
8. Complete applicable background requirements. Follow Arizona’s process for the individuals required to appear on the contractor application.
9. Prepare the license application. Organize qualifying-party information, experience records, examination documentation, business documents, and required disclosures.
10. Obtain the contractor license bond. Arrange the bond required for the dual classification and anticipated annual gross volume of work.
11. Address residential financial protection. Complete the applicable Residential Contractors’ Recovery Fund requirement or authorized alternative.
12. Submit the application. Provide the completed application and supporting materials to the Arizona Registrar of Contractors.
13. Wait for license issuance. Do not advertise, bid, contract for, or perform work requiring the CR-37 license until Arizona approves the application and issues an active contractor license.

State Requirements

The CR-37 classification is an Arizona dual specialty contractor license covering qualifying plumbing work in residential and commercial settings. Contractors must remain within the scope authorized by the classification.

The proposed qualifying party must demonstrate the experience, knowledge, and skills needed to supervise or perform the covered work. Experience documentation may need to describe water piping, sanitary drainage, vents, fixtures, gas piping, equipment, hydronic systems, service, repair, residential projects, commercial projects, and field supervision.

The qualifying party must remain associated with the applicant business in the capacity recognized by the Arizona Registrar of Contractors. Experience records, examination information, and the person’s business role should remain consistent throughout the application process.

The legal business entity applying for the license must be properly established and identified. The business name, ownership information, qualifying-party records, EIN documentation, contractor bond, and license application should remain consistent.

Arizona contractor applicants must complete applicable background requirements and provide the identity, experience, examination, business, and disclosure information required for state review.

A contractor license bond is required. Because CR-37 is a dual classification, the applicable bond requirement combines the residential and commercial components based on the anticipated gross volume of work.

The residential portion of the CR-37 license is also subject to Arizona’s residential financial-protection requirements. The applicant must satisfy the applicable Residential Contractors’ Recovery Fund obligation or authorized alternative.

After licensing, the contractor must remain within the CR-37 scope, maintain the required bond, renew the license, and keep qualifying-party and business information current. Changes involving ownership, entity structure, address, bond, or qualifying party may require additional filings.

Reference Books

• Included Book: Code of Federal Regulations – 29 CFR Part 1926 (OSHA)
  Covers excavation, trenching, ladders, tools, electrical hazards, personal protective equipment, material handling, fall protection, and construction-site safety.
• Included Book: International Fuel Gas Code, 2018
  Addresses fuel-gas piping, sizing, materials, appliance connections, valves, pressure testing, combustion air, regulators, equipment, and venting.
• Included Book: International Mechanical Code, 2018
  Supports study of boilers, hydronic systems, mechanical equipment, ventilation, piping, controls, access, testing, and inspections.
• Included Book: International Plumbing Code, 2018
  Covers water supply, sanitary drainage, vents, fixtures, traps, interceptors, piping materials, backflow protection, water heaters, and testing.
• Included Book: NFPA 13: Installation of Sprinkler Systems, 2019
  Provides installation requirements for automatic sprinkler systems, including water supplies, piping, sprinklers, valves, system types, and testing.
• Included Book: NFPA 13D, 2019
  Addresses sprinkler systems for one- and two-family dwellings and manufactured homes.
• Included Book: NFPA 13R, 2019
  Covers sprinkler systems for qualifying residential occupancies up to and including four stories in height.
• Included Book: On-Site Wastewater Treatment Facility Provisions, Arizona Administrative Code Title 18, Chapter 9, 2006
  Supports study of Arizona provisions involving on-site wastewater treatment and disposal facilities.
• Included Book: Mathematics for Plumbers and Pipefitters, 8th Edition
  Supports trade calculations involving measurements, offsets, elevations, pipe length, area, volume, pressure, flow, capacity, and practical mathematics.
• Included Book: IPT’s Pipe Trades Handbook, Robert A. Lee, 2016
  Provides pipe dimensions, fitting information, formulas, conversions, materials, and practical field data.
• Included Book: Boiler Operator’s Guide, 5th Edition
  Covers boiler components, operation, controls, combustion, safety devices, maintenance, water treatment, and troubleshooting concepts.
• Included Book: Arizona 811 – Arizona Blue Stake Brochure
  Supports preparation involving underground utility notification and safe excavation practices.
• Included Book: Modern Hydronic Heating for Residential and Light Commercial Buildings, John Siegenthaler, P.E., 2022
  Covers hydronic system design, boilers, circulators, controls, heat emitters, piping arrangements, heat loss, and system performance.

All books are highlighted and Tabbed.

The package includes a $1,050 refundable book deposit. The deposit is refundable when the books are returned within one year in similar condition.

Please allow up to 15 business days for The 1 Package book orders.

Test Information and Study Materials

Effective CR-37 preparation should combine plumbing-code navigation, fuel-gas requirements, mechanical systems, sprinkler standards, hydronic heating, wastewater provisions, trade mathematics, and OSHA safety.

Calculation practice may include fixture units, pipe sizing, drainage slope, developed length, pressure loss, gas demand, offsets, elevation, volume, area, flow, and system capacity. Candidates should identify the correct table or formula before performing the calculation.

Water-distribution study may address service piping, fixtures, pressure, valves, backflow protection, thermal expansion, supports, insulation, and testing. Drainage and vent study may include traps, cleanouts, slope, fittings, fixture connections, vent arrangements, and sanitary system design.

Hydronic study may include boilers, circulators, expansion control, air removal, heat exchangers, zoning, heat emitters, controls, and system piping. Sprinkler preparation may include system types, water supplies, piping, valves, sprinklers, testing, and residential applications.

Safety preparation should address trench protection, utility location, ladders, lifting, hot work, electrical hazards, tools, personal protective equipment, material storage, and housekeeping.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep supports Arizona CR-37 candidates through organized study guidance, trade-focused review, practice-oriented preparation, reference navigation, and confidence-building study structure.

The course divides the extensive plumbing library into manageable subjects, including water distribution, drainage, vents, fuel gas, mechanical systems, sprinklers, hydronic heating, wastewater, mathematics, and safety.

Reference-navigation exercises help candidates identify the correct book, locate useful index terms, find applicable tables, and interpret technical requirements. Practice-oriented preparation connects code provisions and calculations with realistic plumbing situations.

The highlighted and tabbed books support efficient navigation, but repeated use remains essential. Working with the references throughout the course helps candidates become familiar with their organization and reduces unnecessary searching during the examination.

Application Service supports the Arizona licensing stage by helping organize qualifying-party information, examination records, business documents, and required application materials. Business Formation establishes an LLC or corporation so the customer has a legally structured business entity.

EIN Filing with the IRS provides the federal identification number used to open business bank accounts, manage taxes properly, hire employees, and operate professionally. Contractor Compliance Guidance supports a clearer understanding of responsibilities associated with maintaining the contractor license, bond, qualifying party, business records, and approved scope of work.

No preparation program or business service can guarantee an examination result, licensing approval, earnings, or business success. The package provides the references, study structure, application support, and business setup services needed to pursue the CR-37 licensing path with stronger organization and confidence.

What is included in The 1 Package?

The package includes thirteen plumbing, mechanical, sprinkler, wastewater, mathematics, hydronic, and safety references, 1 year of course access, Application Service, LLC or corporation formation, EIN Filing with the IRS, and Contractor Compliance Guidance.

What is the total cost?

The package cost is $3,365. A $1,050 refundable book deposit brings the total due to $4,415. The package is all-inclusive with no hidden fees.

How does the refundable book deposit work?

The $1,050 deposit is refundable when the books are returned within one year in similar condition.

Are all books highlighted and tabbed?

Yes. All books are highlighted and Tabbed to support organized study and faster reference navigation.

How long should I allow for the book order?

Please allow up to 15 business days for The 1 Package book orders.

Is the Arizona CR-37 examination open book?

Yes. The Arizona CR-37 plumbing trade examination is open book using approved reference materials under the testing provider’s current rules.

Does CR-37 cover residential and commercial plumbing?

Yes. CR-37 is a dual classification covering authorized plumbing work in residential and commercial settings.

Does the package include fire-sprinkler study materials?

Yes. The package includes NFPA 13, NFPA 13D, and NFPA 13R for preparation involving commercial and residential sprinkler-system provisions.

Does the package include hydronic-heating preparation?

Yes. The package includes Modern Hydronic Heating for Residential and Light Commercial Buildings and the Boiler Operator’s Guide.

Does the package include licensing and business setup?

Yes. The package includes Application Service, LLC or corporation formation, EIN Filing with the IRS, and Contractor Compliance Guidance.

Does passing the examination automatically issue the license?

No. The Arizona Registrar of Contractors must review and approve the complete application before issuing the CR-37 contractor license.