ICC I3 California Commercial Plumbing Inspector Exam Voucher
The I3 California Commercial Plumbing Inspector certification, issued by the International Code Council (ICC), certifies expertise in inspecting commercial plumbing systems to comply with California's strict regulations.
It validates proficiency in enforcing the California Plumbing Code (CPC) (part of Title 24), covering water supply, drainage, venting, fixtures, backflow prevention, and health/safety requirements—essential for professionals in California commercial construction and jurisdictions.
Ideal for:
- Commercial plumbing inspectors in California
- Municipal code officials & building department staff
- Licensed plumbers and plumbing contractors working on commercial projects
Exam details:
- 60 multiple-choice questions
- 2-hour time limit
- Open-book (use the latest CPC and approved references)
- Available online via PRONTO remote proctoring or at Pearson VUE testing centers
Voucher valid for 12 months from purchase. A critical credential for career progression in California commercial plumbing inspection, code enforcement, and building safety roles.

Product Description
What is the I3 Certification?
The ICC I3 California Commercial Plumbing Inspector certification is a professional Inspector-level credential that validates a candidate’s ability to inspect commercial plumbing systems in compliance with California-specific codes. Issued by the International Code Council, this certification demonstrates expertise in enforcing the California Plumbing Code (CPC), including water supply systems, drainage, venting, fixtures, and safety requirements.
The I3 certification is essential for professionals working in California commercial construction, ensuring plumbing systems meet health, safety, and regulatory standards under Title 24 Building Standards.
Who Should Take the I3 Exam?
The I3 certification is ideal for:
Commercial Plumbing Inspectors in California
Municipal Code Officials and Building Department Staff
Licensed Plumbers and Plumbing Contractors working on commercial projects
This certification is often required for roles within California building departments and inspection agencies.
I3 Exam Details & Format
Exam ID: I3
Certification Name: California Commercial Plumbing Inspector
Category: State-Specific Certification
Level: Inspector
Code Year: California Plumbing Code (CPC) – Based on latest adopted California code cycle
Reference Books:
California Plumbing Code (CPC) – Latest Edition
Relevant sections of California Title 24 Building Standards
Exam Format:
60 Multiple Choice Questions
2 Hour Time Limit
Open Book Exam
Testing Method:
PRONTO (Online Remote Proctoring)
Pearson VUE CBT (Testing Center)
Voucher Validity:
12 months from the date of purchase.
Redemption Instructions
Purchase your I3 California Commercial Plumbing Inspector exam voucher
Receive your unique ICC voucher code via email
Log in to your myICC account
Schedule your exam via PRONTO or Pearson VUE and apply your code
Frequently Asked Questions
Which code book is used for the I3 exam?
The I3 exam is based on the California Plumbing Code (CPC), part of the California Title 24 Building Standards.
Is the I3 exam open book?
Yes. ICC exams are open-book. You are permitted to use the CPC and approved references during the exam.
How long is the I3 voucher valid?
The voucher is valid for 12 months from the purchase date, allowing flexible scheduling.
Can the I3 exam be taken online?
Yes. The exam is available via PRONTO online proctoring or at a Pearson VUE testing center.





