North Carolina Plumbing Exam Prep

In North Carolina, the State Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors licenses plumbing contractors in two main classes: Plumbing Contractor Class I (P-I), which covers plumbing in any building, and Plumbing Contractor Class II (P-II), which is limited to single-family detached dwellings. A Restricted Limited Plumbing Contractor license offers a shorter 1,500-hour path with a limited scope, and Plumbing Technician licenses (Class I and Class II) cover employees who do not contract. Fuel piping privileges are included automatically in plumbing and heating contractor licenses.

The exam references the NC State Plumbing Code (2018 North Carolina edition based on the 2015 IPC; confirm the current cycle) along with the Board's published book list. Applications average about 6 weeks to process, so plan your timeline accordingly.

North Carolina plumbing credentials include:

• Plumbing Contractor Class I (P-I) - Plumbing work in any building.
• Plumbing Contractor Class II (P-II) - Plumbing in single-family detached dwellings only.
• Restricted Limited Plumbing Contractor - Limited scope with a 1,500-hour experience path.
• Plumbing Technician Class I / Class II - Employee licenses without contracting privileges.
• Fuel Piping Contractor - Fuel piping only; included automatically in plumbing and heating licenses.

The North Carolina plumbing exam is a computer-based test offered at 7 test centers across the state. You schedule after Board approval and must test within 90 days. Pass or fail results are given at the test center, and the license activation form and fee are due within 45 days of passing. Review the Board's reference book list before your exam date.

The Board reports pass or fail results at the test center rather than publishing a percentage on your report. If you fail, you must wait 90 days before retesting with a new re-exam application. Confirm the current scoring and retest policy with the Board before your exam date.

Typical requirements for the North Carolina plumbing contractor exam include:

• 2 years (4,000 hours) of on-site, full-time plumbing experience.
• Up to half of the requirement (2,000 hours) may be related academic or technical training.
• Technician applicants need 3,000 hours for Class I or 2,500 hours for Class II; the Restricted Limited path requires 9 months (1,500 hours).
• A completed application submitted to the Board with the exam fee.

Requirements can change. Always confirm current licensing rules with the official state licensing authority before applying.

The exam application costs $100 ($25 application plus $75 exam, nonrefundable) under 21 NCAC 50 .1101. The annual license fee is about $150 per contractor license per Board renewal materials; confirm the current amount on the Board's license renewal page. Always confirm current fee amounts with the Board before submitting payment.

A focused 4 to 6 week study plan works well for most candidates:

• Week 1-2: Review the fundamentals of Water Supply Systems and Drainage and Vent Systems.
• Week 3-4: Work through the NC State Plumbing Code and Board reference books, then take a full-length practice test.
• Week 5-6: Review every missed question, drill weak areas, and simulate exam timing.

Practice topics on ExamsLib cover Water Supply Systems, Drainage and Vent Systems, Plumbing Code.