Oregon Irrigation & Backflow Contractor License

The Irrigation & Backflow Contractor License allows you to do the following work:

  • Removal of:
    • Trees
    • Guy limbs
    • Grind stumps
  • Installation of:
    • Backflow devices
    • Low voltage lighting
  • Construction of:
    • Irrigation systems
      • May also keep up compressed air irrigation systems

How to Get the Irrigation & Backflow Contractor’s License in Oregon?

  1. Meet the exam qualification requirements:
    • Be at least 18 years of age
    • Satisfy at least one of the requirements listed down below:
      • A minimum of 2 years of experience in the landscaping field
      • An associate's, bachelor's, or master's degree in horticulture or a similar field
      • 72 credit hours from an accredited school in horticulture or related fields
      • A Landscape Industry Exterior Technician certification from the National Association of Landscape Professionals
      • A valid Certified Professional Membership with the Association of Professional Landscape Designers
      • Other related individual-certified memberships
  2. Fill out the application. The application can be submitted through the application portal or by filling out the printable form
  3. Schedule the examination with PSI©:
    1. Sign in or register
    2. Take and pass the following portions of the landscape examination:
      • Irrigation
      • Backflow
      • Laws, Rules and Business Practices
    3. Refer to the PSI© Candidate Information Bulletin and the LCB exam resource materials for more information on the test
    4. Schedule and pay for the examination
  4. Wait for an email from the Board notifying you of their decision after passing the exam
  5. Expect an email with the information to activate an account for accessing the individual portal once the application is approved

Oregon Irrigation & Backflow Contractor License Exam Prep Course

  • 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

Oregon Irrigation & Backflow Contractor License Exams

Below is all the information related to the trade and Laws, Rules and Business Practices exams, including the official reference lists.

Oregon Irrigation & Backflow Contractor Irrigation Trade Exam

  • Testing Method: Computer-based at a Test Center
  • Testing Company: PSI©
  • Number of Questions: 100
  • Types of Questions: Multiple choice
  • Time Allowed: 200 Minutes
  • Minimum Passing Score: 75 Questions (75%)
  • Subjects Involved (No. of Questions):
    • Design (25)
    • Drip Irrigation (9)
    • Electrical (6)
    • Heads/Nozzles (8)
    • Hydraulics (12)
    • Install/Practical Applications (4)
    • Pipe/Fittings (11)
    • Plan Questions – Irrigation (6)
    • Plant Culture – Irrigation (7)
    • Repair/Troubleshooting (4)
    • Valves (2)
    • Winterizing (2)
    • Scheduling (4)
  • PSI© Irrigation Official Content Outline

Oregon Irrigation & Backflow Contractor Backflow Trade Exam

  • Testing Method: Computer-based at a Test Center
  • Testing Company: PSI©
  • Number of Questions: 50
  • Types of Questions: Multiple choice
  • Time Allowed: 100 Minutes
  • Minimum Passing Score: 38 Questions (75%)
  • Subjects Involved (No. of Questions):
    • Definitions (11)
    • Devices (21)
    • Piping (8)
    • Installation Code (10)
  • PSI© Backflow Official Content Outline

Oregon Irrigation & Backflow Contractor Laws, Rules and Business Practices Exam

  • Testing Method: Computer-based at a Test Center
  • Testing Company: PSI©
  • Number of Questions: 50
  • Types of Questions: Multiple choice
  • Time Allowed: 100 Minutes
  • Minimum Passing Score: 38 Questions (75%)
  • Subjects Involved (No. of Questions):
    • License Requirements (6)
    • Insurance/Bonding (4)
    • Employment Law (6)
    • Contracts (4)
    • Supervision (4)
    • Claims/Dispute Resolution (4)
    • Lien Law (4)
    • Building Codes/Permits (4)
    • Safety/Hazard Communication (6)
    • Communications (4)
    • Estimating (4)
  • PSI© Laws, Rules and Business Practices Official Content Outline

Oregon Irrigation & Backflow Contractor Book Set

This set of books includes all required references for the Irrigation & Backflow and Laws, Rules and Business Practices exams. Orders placed before 2 PM are shipped the same day via UPS and a tracking number is emailed before 3 PM.

  • OREGON IRRIGATION & BACKFLOW - BOOK SET WITHOUT TABS INCLUDES ALL BOOKS FOR TRADE AND BUSINESS EXAMS

    Sales price: $386.90
  • OREGON IRRIGATION & BACKFLOW - BOOK SET WITH TABS INCLUDES ALL BOOKS FOR TRADE AND BUSINESS EXAMS

    Sales price: $446.90

Oregon Irrigation Exam Books

Books Allowed in Testing

Oregon Backflow Exam Books

Books Allowed in Testing

Oregon Irrigation & Backflow Laws, Rules and Business Practices Exam Books

Books Allowed in Testing

The Laws, Rules and Business Practices Guide is needed for the Laws, Rules and Business Practices examination, and for both the Irrigation and Backflow sections.