Residential Water-Heater Installer (WHI) Last updated 10/26/2021

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License Fee Description Exemptions


A person licensed as a limited specialty plumber by the State Plumbing Board can replace existing water heaters in one- and two-family dwellings.


License renewal is every three years on April 1.

Renewal Information

A renewal notice will be mailed to the licensee approximately six weeks prior to the expiration of their license. Continuing Education (if necessary) and fees will be explained on the renewal form. Renewal fees vary by license type

Duplicate License Requirements

If you lost your license or have changed your address and would like a replacement license, submit form 2523 from Building Codes website, along with appropriate $10 fee.

Processing Time

Processing Time Description
1 Week Incomplete applications may cause delays

Prerequisites and Requirements


Be an individual sole proprietor, partner in a partnership, or designated officer or employee of a corporation, with both an Electrical Limited Specialty (LMS) and a plumbing contractor license;
• Have the application signed by the plumbing-electrical contractor in step 6;
• Complete an approved 8-hour training class for WHIs

Required Documentation

Completed application with applicable fee
Copy of high school diploma, GED or equivalent
Copy of apprenticeship completion (if required by license type)
Experience qualification documents (if required by license type)

Examination Information

Three-hour, 52 question open book. Upon approval, a list will be provided outlining approved exam material.

Continuing Education Requirements

Exempt from continuing education requirements.​

Bonding Requirements


Insurance Requirements


Additional Information

Other Information

Applicants are required to be employed by a registered plumbing contractor with a limited maintenance specialty contractor license.

Statutes, Administrative Rules, Ordinances

Other Detail Information

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