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What Is a Master Plumber? A master plumber is a licensed plumbing professional who has passed a state's rigorous testing and certification process for plumbers. To earn this designation, a plumber has to not only pass the tests but accumulate years of practical experience in the plumbing and pipefitting field.
Master Plumber Certification. As in any job, the adage of paying your dues holds true in plumbing. Before you can move up in the ranks -- and the pay scale -- to master plumber, you must complete a plumbing apprenticeship program through a union or trade school. Requirements vary from state to state, but typically these are four-year programs that include classroom and on-the-job training. The next step is journeyman, and after holding that position for two years or so, depending on state requirements, you can become a master plumber -- but not without passing a state-sanctioned exam. Mastering the trade and all of the laws that go along with it pays off.