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Oklahoma Plumber License General FAQ

  • Apprentice
  • Journeyman
  • Plumbing Contractor
  1. Applicants for the journeyman examination must be eighteen (18) years of age or older and have either:
    • three (3) years of experience in the plumbing trade while employed by a licensed Plumbing contractor, or
    • equivalent verifiable three (3) years of experience in the plumbing trade while serving in the U.S. military, or
    • a verifiable out-of-state plumbing license that must be:
      • current, and
      • in good standing
    • The following may be substituted for a portion of the experience requirement:

    An associate degree or Career Tech diploma certifying completion of a plumbing educational program consisting of a minimum of 1000 classroom hours from a school, approved by the Committee, may be substituted for two (2) years of experience. A Career Tech diploma certifying completion of an educational program consisting of a minimum of 500 classroom hours from a school, approved by the Committee, may be substituted for one (1) year of experience.

    1. Applicants for a contractor license must meet the same requirements as a journeyman which are below:

      Applicants for the journeyman examination must be:

      • eighteen (18) years of age or older and have either:
      • three (3) years of experience in the plumbing trade while employed by a licensed plumbing contractor, or
      • equivalent verifiable three (3) years of experience in the plumbing trade while serving in the U.S. military, or
      • a verifiable out-of-state plumbing license that must be:
        • current, and
        • in good standing
    2. Applicants for a contractor license must meet the same requirements as a journeyman with an additional one (1) year of experience in the Plumbing trade.

      The following may be substituted for a portion of the experience requirement:
      An associate degree or Career Tech diploma certifying completion of a plumbing educational program consisting of a minimum of 1000 classroom hours from a school, approved by the Committee, may be substituted for two (2) years of experience. A Career Tech diploma certifying completion of an educational program consisting of a minimum of 500 classroom hours from a school, approved by the Committee, may be substituted for one (1) year of experience.

    For complete information on licensing requirements see the Plumbing License Law of 1955 and Plumbing Industry Regulations.

Plumbing Practical Exam

  • Administration, Scope and Intent/Purpose
  • Definitions and Symbols
  • Plumbing Math
  • General Regulations
  • Fixtures, Faucets, and Fixture Fittings
  • Water Heaters
  • Water Supply and Distribution
  • Sanitary Drainage
  • Indirect and Special Waste
  • Vents
  • Traps, Interceptors, and Separators
  • Storm Drainage
  • Nonpotable Water Systems
  • Subsurface Landscape Irrigation Systems
  • Appendix E
  • Isometrics
  • Private Sewage Systems
  • International Fuel Gas Code
  • Hands-On Practical Application
  • Practice Tests

Business & Law

  • Estimating and Bidding
  • Project Management
  • Contracts
  • Business Organization
  • Financial Management
  • Labor Law
  • Risk Management
  • Tax Law
  • Safety Recordkeeping
  • Licensing
  • Lien Law
  • OSHA

Bonus Materials

  • Reading and Understanding the PSI Bulletin
  • Books That You Should Have During the Exam
  • Effective Study Techniques

Oklahoma Construction Industries Board Plumbing Division
2401 NW 23rd Street, Suite 2F
Oklahoma City, OK 73107
Telephone: (405) 521-6550

Useful Links

Oklahoma Plumber PSI Candidate Bulletin

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