Arizona Plumbing (C-37) Contractor License

The Arizona Plumbing (C-37) Contractor License allows you to do the following work:

  • Plumbing (within property lines, not on public easements or right-of-ways)
  • Water supply piping and fixtures
  • Pressure vessels and tanks
  • Venting and sanitary drainage
  • Septic tanks and leaching lines
  • Roof leaders
  • Lawn sprinkler
  • Water conditioning equipment
  • Piping
  • Equipment for swimming pools
  • Piping and pressure vessels (no more than 30 PSIg or 220° F) for:
    • Manufactured and natural gases
    • Compressed air
    • Vacuum systems
    • Petroleum
    • Fuel Oil
    • Non-potable liquids
    • Hot water heating
    • Hot water supply systems
  • Steam systems not exceeding 15 PSIG operating pressure
  • Gas and oil fired space heaters and furnaces, excluding duct work
  • Piping for water cooling systems, excluding refrigerant piping and equipment
  • Testing and balancing of hydronic systems

How to get the Plumbing (C-37) contractor’s license in Arizona?

  1. Identifying a Qualifying Party - A sole proprietorship (individual), a partnership, limited liability company, or a corporation may apply for a Plumbing (C-37) contractor's license if they have a regularly employed person with the necessary experience, knowledge, and skills who serves as the qualifying party. All persons listed on the application must be 18 years of age or older.
  2. Experience Requirements - The license classifications requirements must be met or exceeded when applying for an Arizona Plumbing (C-37) contractor license. This license requires a minimum of 4 Years in the trade.
  3. Examination Requirements - The applicant must pass the SRE and Plumbing (C-37) trade exam. The minimum passing score is 70%. Once completed, the results must be submitted to the ROC.
  4. Background Checks - The applicant and qualifying party must submit copies of the payment transaction receipt from their background checks.
  5. Form a Legal Entity - Partnerships must register with the Arizona Secretary of State. LLC’s and corporations are required to register with the Arizona Corporation Commission.
  6. Bond - The applicant must obtain and submit proof of a license bond. They must also include all required fees and assessments with the license application. The required bond amounts are as follows:
    Gross Volume | Bond Amount
    $150,000 or less | $2,500
    In excess of $150,000 but not more than $500,000 | $7,000
    In excess of $500,000 but not more than one million | $17,500
    In excess of one million but not more than five million | $25,000
    In excess of five million but not more than ten million | $37,500
    Over ten million | $50,000
    The bond can be obtained from an Arizona-Licensed Surety Products Provider.
  7. Identification Forms - Both the Applicant and the Qualifying Party must submit a copy of their government-issued identification with the application. Driver Licenses and passports are acceptable forms of identification.
  8. Submit Application - Complete and submit a License Application Form to the Registrar by going to their physical location or by mailing the application to the Registrar of Contractors.

Arizona Plumbing (C-37) Contractor License Exam Prep Course

Before getting your Arizona Plumbing (C-37) Contractor License you will need to complete the Arizona Statutes and Rules Training Course and Exam (SRE).

Arizona Plumbing (C-37) Contractor License Exam

Below is all the information related to the exam including the content outline and the official reference list.

  • Optional: No
  • Testing Method: Computer-based testing
  • Type of Exam: Semi-open book
  • Testing Company: PSI©
  • Number of Questions: 100
  • Time Allowed: 240 Minutes
  • Minimum Passing Score: 70%
  • Subjects Involved (number of questions):
    • Drainage Waste and Vents (15)
    • Indirect Waste (4)
    • Water Supply Systems (12)
    • Backflow Prevention (5)
    • Roof Drains and Storm Drainage Systems (5)
    • Plumbing Fixtures (including water heaters and accessibility) (6)
    • General Knowledge (8)
    • Specialty Plumbing, Interceptors, and Traps (5)
    • Fuel Gas (11)
    • Septic and Sewer (11)
    • Hydronics (6)
    • Fire Sprinklers (6)
    • Excavation (6)
  • PSI© Plumbing (C-37) Official Content Outline

Arizona Plumbing (C-37) Contractor Book Set

This set of books includes all required references for the Plumbing (C-37) exam. Orders placed before 2 PM are shipped the same day via UPS and a tracking number is emailed before 3 PM.


    Sales price: $1,300.80

    Sales price: $1,400.80

Arizona Plumbing (C-37) Contractor Exam Books

Books Allowed in Testing

Books Not Allowed in Testing