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Plumbing License Requirements. Plumbers licensing requirements for a journeyman and master plumbers license are usually determined at the state level and the necessary requirements and exams vary in each State. The enforcing & regulating of the state plumbing licensing requirements often fall under individual municipalities.
License Qualification Process. The Ohio Construction Industry Licensing Board (OCILB) issues State Licenses to Commercial Contractors for the following trades: Electrical, HVAC, Hydronics, Plumbing, and Refrigeration. To receive a state license, an applicant must meet the following requirements: Be at least 18 years of age.