Hawaii Plumbing (C-37) Contractor License

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

  • Plumbing systems
  • Supply water piping systems
  • Waste water piping systems
  • Fuel gas piping systems
  • Other fluid piping systems
  • Equipment
  • Instrumentation
  • Non-electric controls
  • Fixture for these systems
  • Venting for waste water piping systems
  • Venting for fuel gas piping systems
  • Including piping for vacuum, air, and medical gas systems
  • Pipgin for spas and swimming pools
  • Piping for lawn sprinkler systems
  • Piping for irrigation systems
  • Sewer lines
  • Related sewer disposal work performed within property lines
  • Fire protection sprinkler systems when supervised by licensed
  • mechanical Engineers or licensed fire protection contractors
  • Solar hot water heating systems
  • Incidental trenching, back filling, patching, and surface restoration

How to get the Plumbing (C-37) Contractor’s License in Hawaii?

  1. Register with the Business Registration Division.
  2. Have a good reputation for honesty, truthfulness, financial integrity and fair dealing.
  3. Obtain liability and workers' compensation insurance.
  4. Have in your employ a licensed individual who is designated Responsible Managing Employee (RME).
  5. Attach the application fee (non-refundable) to your application.
  6. Fill & Submit your Application to the Honolulu office on or before the first Tuesday of the month two months prior to the scheduled meeting date.
  7. Submit a current (not more than a year old) financial statement accompanied by an independent accountant's report.
  8. Submit a current and complete credit report for each officer, partner, manager, or member, (from a credit reporting agency issued not more than 6 months ago) covering at least the previous 5 years.
  9. Submit a current Hawaii State Tax Clearance (issued not more than 6 months old) with an original State Department of Taxation stamp.
  10. If you are planning to use a trade name, submit a filed-stamped copy of current trade name registration approved by the Business Registration Division of the Department of Commerce and Consumer Affairs.
  11. Once approved by the board, schedule your exam with the testing provider.
  12. Once you pass the examination, the Board will reach out to you to satisfy all license requirements such as Workers' Compensation Insurance, Liability & Property Damage Insurance, place of business, and any other fees. Once those requirements are met, the board will issue you a license.
  13. Experience Requirements: Applicant must be not less than 18 years of age, have 4 years of supervisory experience within the past 10 years, and be employed by a licensed contracting entity.

Hawaii Plumbing (C-37) Contractor License Exam Prep Courses

  • Login credentials emailed upon enrollment

    Unlimited access (no time limits)

    Lecture videos

    Practice questions

    Key concepts

    Step-by-step solutions to math problems

    $525.00
    $525.00
  • Login credentials emailed upon enrollment

    Unlimited access (no time limits)

    Lecture videos

    Practice questions

    Key concepts

    Step-by-step solutions to math problems

    $340.00
    $340.00

Hawaii Plumbing (C-37) Contractor License Exams

Below is all the information related to the trade and business exams, including the official reference list.

Hawaii Plumbing (C-37) Contractor Trade Exam

  • Testing Method: Computer-based testing
  • Testing Company: Prometric©
  • Number of Questions: 80
  • Types of Questions: Multiple Choice
  • Time Allowed: 180 Minutes
  • Minimum Passing Score: 75%
  • Subjects Involved (Percentage):
    • Water Supply and Distribution (25%)
    • Drain, Waste and Venting (25%)
    • Size and Estimating (15%)
    • Fuel and Medical Gas (13%)
    • Fixtures and Trim (6%)
    • Excavation (6%)
    • Building Sewers (10%)
  • Prometric© Plumbing (C-37) Official Content Outline

Hawaii Plumbing (C-37) Contractor Business Exam

  • Testing Method: Computer-based testing
  • Testing Company: Prometric©
  • Number of Questions: 80
  • Types of Questions: Multiple Choice
  • Time Allowed: 180 Minutes
  • Minimum Passing Score: 75%
  • Subjects Involved (Percentage):
    • Business Organization (3%)
    • Licensing (10%)
    • Estimating and Bidding (12%)
    • Contract Management (18%)
    • Project Management (9%)
    • Public Works Laws (5%)
    • Risk Management (10%)
    • Safety (7%)
    • Labor Laws (7%)
    • Financial Management (9%)
    • Tax Laws (6%)
    • Lien Law (4%)
  • Prometric© Business and Law Official Content Outline

Hawaii Plumbing (C-37) Contractor Book Set

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

  • HAWAII PLUMBING (C-37) - BOOK SET WITHOUT TABS INCLUDES ALL BOOKS FOR TRADE AND BUSINESS EXAMS

    Sales price: $773.51
  • HAWAII PLUMBING (C-37) - BOOK SET WITH TABS INCLUDES ALL BOOKS FOR TRADE AND BUSINESS EXAMS

    Sales price: $843.51

Hawaii Plumbing (C-37) Contractor Exam Books

Books Not Allowed in Testing

Hawaii Business and Law Exam Books

Books Not Allowed in Testing