Yes.
Alaska licenses plumbing work statewide through Certificates of Fitness issued by the Department of Labor and Workforce Development's Mechanical Inspection section: Plumber Trainee, Plumber Gas, Plumber Restricted Utility and Plumber Journeyman.
The journeyman path runs through an apprenticeship registered with the U.S. Department of Labor, 8,000 hours of legally obtained installation work while holding an Alaska Trainee COF, and an open-book exam on the 2018 Uniform Plumbing Code.
There is no state master plumber license: Mechanical Inspection says a Mechanical Administrator license held with a trade COF functions like one.
Verify before you rely on this
At a glance
Yes.
Plumbing work requires a state Certificate of Fitness (COF) from the Department of Labor and Workforce Development's Mechanical Inspection section.
Mechanical Inspection (DOLWD) issues the plumbing COFs; the Mechanical Administrator license and contractor registration sit with CBPL.
Plumber Trainee, Plumber Gas (PG), Plumber Restricted Utility (PU) and Plumber Journeyman.
There is no state master plumber license.
Journeyman: 8,000 hours of legally obtained plumbing installation work while holding an Alaska Trainee COF.
Plumber Gas: 4,000 hours, at least 2,000 in fuel gas piping, while holding a Trainee COF.
Open-book Plumber Journeyman exam on the 2018 Uniform Plumbing Code; a 70 percent score passes, with a 30-day wait after a failed attempt.
Journeyman renewal is $200 with 16 hours of CE in the preceding 24 months, at least 8 of them on UPC changes.
A Reciprocal Plumber Journeyman COF: your out-of-state license active for one full year, and Mechanical Inspection judging the requirements substantially similar.
MY LICENSE at professionallicense.alaska.gov; our research did not confirm a COF-specific public search, so check with Mechanical Inspection.
The entry certificate: applicants document indenture in a U.S. DOL Office of Apprenticeship plumber apprenticeship with a Davis Bacon letter, and hours worked in Alaska count toward a certificate of fitness only while the Trainee COF is held.
Covers fuel and gas piping within property lines; qualification takes 4,000 hours in the trade, at least 2,000 in fuel gas piping, while holding a Trainee COF.
One of Mechanical Inspection's plumbing certificate classes; our research did not confirm what this class covers, so check with Mechanical Inspection.
Requires 8,000 hours of legally obtained plumbing installation work while holding an Alaska Trainee COF, plus the open-book 2018 Uniform Plumbing Code exam passed at 70 percent or higher.
A CBPL supervisory license that does not authorize code work; Mechanical Inspection says holding it together with a trade COF functions like a master trades license.
Yes.
Alaska requires a state Certificate of Fitness (COF) to do plumbing work, issued by the Department of Labor and Workforce Development's Mechanical Inspection section.
The plumbing classes are Plumber Journeyman, Plumber Gas (PG), Plumber Restricted Utility (PU) and trainee certificates, and the requirement is statewide.
Mechanical Inspection's jurisdiction covers communities with populations of 2,500 and above; the Municipality of Anchorage inspects under an agreement, but a state COF is still required there.
Mechanical Inspection's plumbing classes are Plumber Journeyman, Plumber Gas (PG), Plumber Restricted Utility (PU) and trainee certificates.
A Plumber Gas certificate covers fuel and gas piping within property lines; our research did not confirm the scope of the Plumber Restricted Utility class, so ask Mechanical Inspection what it covers before you rely on the title.
There is no state master plumber license in Alaska.
Mechanical Inspection's FAQ says holding a Mechanical Administrator license together with a trade COF functions like a master trades license β but an administrator license does not itself authorize the holder to perform code work, and a person may hold both.
In the unlimited commercial and industrial plumbing category, the administrator qualification requires journeyman plumber (or plumbing field-superintendent) experience for at least four of the six years before applying, or an ME degree/PE route.
On the business side, a plumbing contractor is a registered Mechanical Contractor with a Mechanical Administrator in the plumbing category β there is no separate plumbing contractor license.
The Plumber Trainee certificate is the entry point.
Applicants must submit a Davis Bacon letter as documented proof of indenture in an apprentice plumber program accredited by the United States Department of Labor, Office of Apprenticeship, and the fee is a $50 application plus a $200 certificate.
Apprentices must be sponsored by an employer and registered in the federal Registered Apprenticeship program (RAPIDS) before any hours count toward a certificate of fitness, and a job site may have no more than two plumber trainees for every certified plumber journeyman.
The Plumber Journeyman COF requires 8,000 hours of legally obtained work in installation of commercial/residential plumbing, earned while holding an Alaska Trainee COF.
Within that total, up to 4,000 military/vocational hours, 1,000 classroom hours, 500 utility hours and 2,000 gas hours may count, and maintenance hours do not count.
The Plumber Gas COF takes 4,000 hours in the trade, at least 2,000 of them in fuel gas piping, while holding a Trainee COF.
Journeyman fees are a $50 non-refundable application fee plus a $200 certificate fee.
β8,000 hours of legally obtained work in installation of commercial/residential plumbing.β
Mechanical Inspection publishes the test rules for the plumbing COF exams.
A score of at least 70 percent is required to pass, and there is a 30-day wait after a failed attempt.
The Plumber Journeyman exam is open book on the 2018 Uniform Plumbing Code β the same code Alaska adopts under 8 AAC 63.101 (IAPMO).
Beyond the code basis, our research does not describe the exam's content outline, so check Mechanical Inspection's test information page before you book.
Renewing a Plumber Journeyman COF costs $200, and renewal requires continuing education of 16 hours within the preceding 24-month period.
At least eight of those hours must cover significant changes or updates to the Uniform Plumbing Code.
Our research did not confirm the renewal mechanics beyond those rules, so confirm the current renewal steps with Mechanical Inspection before your certificate expires.
βContinuing education of 16 hours within the preceding 24-month period. At least eight hours must cover significant changes or updates to the Uniform Plumbing Codeβ
Alaska offers a Reciprocal Plumber Journeyman COF for plumbers licensed in another state.
The out-of-state license must have been active for one full year, and the origin state's requirements must be substantially similar to Alaska, as determined by Mechanical Inspection.
This is not a list of named partner states β Mechanical Inspection makes the similarity call β and the fees mirror the journeyman path: a $50 application plus a $200 certificate.
Contact Mechanical Inspection before you apply to confirm that your state qualifies.
βOrigin stateβs requirements must be substantially similar to Alaska, as determined by Mechanical Inspection.β
Alaska's MY LICENSE portal at professionallicense.alaska.gov is the state's online system for looking up and renewing contractor registrations and professional licenses.
Plumbing certificates of fitness are issued by Mechanical Inspection, and our research did not confirm a COF-specific public search on that portal.
To verify a plumber's certificate, or to check that your own appears once issued, contact Mechanical Inspection.
Alaska has a standalone gas-fitter credential, and it is a certificate of fitness: the Plumber Gas (PG) COF, which Mechanical Inspection lists as a plumbing class alongside Plumber Journeyman.
It covers fuel and gas piping within property lines, and qualifying takes 4,000 hours in the trade, at least 2,000 of them in fuel gas piping, while holding a Trainee COF.
Our research did not surface a separate statewide backflow credential for Alaska; ask Mechanical Inspection where a project involves backflow work.
This page summarizes the Alaska board pages, statutes, rules and other sources listed below, as read for this state-by-state plumbing licensing series, current as of September 2026.
It is not a substitute for the instructions the Alaska Department of Labor and Workforce Development, Mechanical Inspection section publishes.
For the rest of the picture in Alaska, see HVAC licensing in Alaska, plumbing apprenticeships in Alaska, plumbing contractor licensing in Alaska, and plumber pay in Alaska.
The requirement is 8,000 hours of legally obtained plumbing installation work while holding an Alaska Trainee COF.
Within that total, up to 4,000 military/vocational hours, 1,000 classroom hours, 500 utility hours and 2,000 gas hours may count, and maintenance hours do not count.
Because hours worked in Alaska only start counting once you hold a Trainee COF, getting indentured in a DOL-registered apprenticeship first is what starts the clock.
No. Alaska does not issue a state master plumber license.
Mechanical Inspection's FAQ says holding a Mechanical Administrator license together with a trade certificate of fitness functions like a master trades license.
Mind the limits: an administrator license does not authorize the holder to perform code work, and you may hold both credentials at once.
Yes, if you want your hours to count.
Alaska Plumber Trainee COF applicants must submit a Davis Bacon letter proving indenture in a plumber apprenticeship accredited by the United States Department of Labor, Office of Apprenticeship.
Hours count toward a certificate of fitness only after your employer sponsors you and you are registered in the federal Registered Apprenticeship program (RAPIDS).
Job sites are also capped at two plumber trainees per certified journeyman.
Through a Reciprocal Plumber Journeyman COF.
Your out-of-state license must have been active for one full year, and Mechanical Inspection must find the origin state's requirements substantially similar to Alaska's.
Fees are a $50 application plus a $200 certificate.
Mechanical Inspection makes that call rather than working from a named partner-state list, so confirm with it that your state qualifies before you apply.
Alaska adopts the 2018 Uniform Plumbing Code (IAPMO) under 8 AAC 63.101, and the Plumber Journeyman exam is open book on that code.
A score of at least 70 percent is required to pass, with a 30-day wait after a failed attempt.
Sources
Sourced from the documents listed above.
Verified September 2026.
This is career information, not legal advice.
Confirm current rules with the Alaska Department of Labor and Workforce Development, Mechanical Inspection section.