Become a Certified Pool & Spa Service Technician


After completing this pool technician certification course, you will be able to:

  • Explain common problems with pool finishes and how to repair them
  • Keep pools running more efficiently with a better understanding of circulation, filtration, hydraulics, and electricity
  • Grow your practical knowledge and gain troubleshooting skills and resources
  • Distinguish yourself as an experienced and knowledgeable service technician

Prerequisites to Apply

  • 2 years of industry experience
  • Successful completion of the Certified Service Technician® (CST) course
  • Pass the CST Exam

Exam Information

To become certified as a CST (Certified Service Technician®), you must complete the CST course and take the CST Exam. An additional registration form and $115 fee for the CST Exam is required. The CST Exam is 2.5 hours long, open book, with 100 multiple-choice questions. You must score 75% or better to pass (answering at least 75 questions correctly).

Exam Content Breakdown

Unit Number of Questions
Unit 1: Safety 4 questions
Unit 2: Practical Knowledge 6 questions
Unit 3: Water Quality 12 questions
Unit 4: Structures and Finishes 7 questions
Unit 5: Circulation and Filtration 13 questions
Unit 6: Electrical Requirements (includes lighting) 13 questions
Unit 7: Pump Motors 10 questions
Unit 8: Heaters & Optional Equipment 16 questions
Unit 9: Control Systems 5 questions
Unit 10: Maintenance 14 questions
  100 questions total

Choose How to Take the Exam

  • On a computer at a PSI computer testing center near you. Computer testing gives immediate test results and flexible time to take the exam.
  • On a computer remotely proctored at your convenience. Remote proctored computer testing gives immediate test results and unparalleled flexibility to take the exam.
  • At a PHTA national, regional, or chapter-sponsored testing event. A list of upcoming events can be found here. You will receive your exam results by US Mail approximately 3 weeks after the exam.

Please contact PHTA at certification@phta.org for additional information on the CST Exam and application process.

Online CST Course

This self-paced online course format is interactive and engaging with videos, quizzes, and exercises.

Purchase the CST Course

Please Note:

  • Students who have started and need to finish the course, click here
  • Students who have purchased the course but have not yet started it, click here.

Testing Options

The CST certification exam costs $115. Candidates must submit a completed application at least 14 days in advance of their testing date.

  1. Test at a PHTA national, regional or chapter-sponsored education and testing event.

  2. Test at an accredited community college or university in your area. You might need to pay an additional exam proctor fee, which could be up to $40. Contact your local community colleges and libraries to find your nearest proctored testing center.

    Additional responsibilities if you test at a college or university:

    • Scheduling an appointment for testing.
    • Providing PHTA University with your name, mailing address, and exam date.

Course Materials and Forms

Maintain Your Certification

Learn more about maintaining your status as an PHTA-certified individual and continue to enjoy the associated benefits. Find the recertification application here.

From Our Members

“Our industry has changed so much over the last five or 10 years. If you're not constantly getting education, reading and learning more, you won't know the technology. If you want to be a professional, you have to have education.”

Noel Conley, CSP, CST | Miracle Pool Service | Garland, TX


Pool & Hot Tub Alliance Strategic Partners:

  • Fluidra
  • Hayward
  • Lou
  • Pentair

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