Plumbing and Mechanical Systems
Plumbing & Mechanical Licenses Through DIAL
DIAL handles licensing for plumbing and mechanical professionals in Iowa, including plumbing, HVAC, hydronics, and refrigeration. The agency offers licenses for apprentices, journeypersons, masters, contractors, and some specialties. Each license has its own education, testing, and fee requirements. DIAL helps make sure workers follow the law and that the public stays safe.
License & Certification Types
Detailed information outlining requirements for licensure.
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Apprentice Licence
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Contractor License
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Journey Level License
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Master Level License
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Post-examination Licensure
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Disconnect/reconnect plumbing technician specialty
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Hearth Systems Specialty License
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Medical Gas Piping Certification
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Private School or College Routine Maintenance
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Service Technician HVAC Specialty License
Continuing Education & Training
Iowa law requires members of every licensed or regulated profession to obtain continuing education as a condition of license renewal. (See Iowa Code section 105.20 and chapter 272C.) For each plumbing and mechanical systems board license, the basic requirement is at least eight hours of classroom instruction during each three-year licensing term. For a course to be valid, both the instructor and the course must be pre-approved by the board.