Plumbers' Examining Board

Welcome to the website of the Office of Professional and Occupational Regulation, an agency within the Department of Professional and Financial Regulation. We appreciate your visit to our homepage and we look forward to assisting you.

Although our building in Gardiner, Maine is not open to the public due to the COVID-19 health emergency, our staff remains available to resolve your complaints, answer your questions, and continue to deliver high-quality services to consumers and regulated industries.

Please contact us by email or by phone or through our other online services, and we will assist you. Thank you, and we look forward to hearing from you.

The staff of the Office of Professional and Occupational Regulation


The Plumbers' Examining Board was established to preserve and protect the health of the people of the State of Maine by insuring the existence of adequate safety and health standards for plumbing installations, to examine and license persons performing plumbing in the State of Maine.

The primary responsibilities of the Board are to establish and determine qualifications and oversee the administration of examinations of any person applying to act as a plumber, to investigate all complaints of noncompliance of violations of the current board law or rules, to recommend suspension or revocation to the Administrative Court under the APA of all licensees found to be guilty of fraud, deceit, negligence or misconduct.

Updated Guidance and Retiring of Covid-19 Prevention Checklists, May 26, 2021 (PDF)

Notice Regarding License Verification Requests (PDF)

Effective March 1, 2019, the Office of Professional and Occupational Regulation (OPOR) will no longer issue paper license verifications. License verifications are available, free of charge, on OPOR’s official database, This database is updated in real time as changes occur. The Office of Professional and Occupational Regulation considers this information to be a secure, primary source for license verification.

Information and Resources

Examination Information Bulletin

The Maine Plumbers’ Examining Board has contracted with PROV, Inc. to provide its examinations for approved candidates. The Candidate Information Bulletin (PDF) helps explain the rules and processes candidates will need to undertake to complete the testing requirements for their professional licenses.


Notice of Agency proposed rulemaking - Office of Professional and Occupational Regulation - Plumbers' Examining Board - Chapter 4 (Installation Standards) Public Hearing scheduled:  June 7, 2021 at 9:00 a.m. via remote access (Zoom)

Notice of Agency Rulemaking Proposal Chapter 4 Installation Standards (PDF)


The Plumbers’ Examining Board has adopted and incorporates herein by reference the International Association of Plumbing and Mechanical Officials Uniform Plumbing Code, 2015 edition, as the standard for plumbing installations in the State of Maine, subject to the exclusions and amendments set forth in the Board’s laws and rules (PDF).

2018 PHCC Uniform Plumbing Code Presentation

2018 PHCC Uniform Plumbing Code Presentation (pdf)

2015 Common Plumbing Code Issues (pdf)

License Delivery

Future correspondence from the Plumbers' Examining Board will be sent to you by email, so please be sure to keep your contact information current. Follow this link to verify your contact information.

License Descriptions

How to apply for a license

Veterans Preference Policy (adopted February 2017)

The Office of Professional and Occupational Regulation wants to make sure that individuals who have military experience and training and who wish to obtain a plumbing license receive appropriate credit for their military training and experience. If you have military experience and training in the plumbing field and want to become licensed in Maine as a Master or Journeyman Plumber, please contact Catherine Carroll (207-624-8605) or email the office before submitting an application. We will explain the application process and assist you in preparing your application for licensure.

Air Testing

On March 9, 2011, the Plumbers' Examining Board voted to allow the testing of plastic schedule 40 DWV piping systems with 5 psi maximum of air. For safety purposes, when testing with air, a listed 6 psi relief valve is required. Click here for a copy of the policy (PDF).

Requirement to Report Convictions and Changes of Contact Information Within 10 Days of the Occurrence

10 Day Notification

The Maine State Bureau of Identification provides the ability for individuals to request criminal history records maintained by the Maine State Police, State Bureau of Identification. This records search will provide you with all conviction and adjudication information for crimes committed within the State of Maine that the Bureau of Identification currently has on record, as well as pending cases less than one year old.

Laws & Rules

Plumbers' Examining Board Laws & Rules (PDF)


EPA's Lead-Based Paint Renovation, Repair and Painting Program Rule (PDF)