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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.
Salary by Experience. As of 2014 data compiled by PayScale.com, experienced master plumbers can expect to make $36,425 to $81,382. Additionally, the website noted that having project management experience is one factor that can contribute to higher earning potential.