Tennessee to Rhode Island: master plumber license reciprocity

Rhode Island issues a statewide Master Plumber license through the same DLT Board of Examiners of Plumbers (R.I. Gen. Laws §§ 5-20-3, 5-20-8, 5-20-16). A master’s license is required to engage in the plumbing business; journeypersons work under a master (§§ 5-20-8, 5-20-9). Firms need a contractor master under § 5-20-12.1 in addition to the individual master — that contractor-master credential is not this file’s master level. Licenses are issued on examination (§ 5-20-21). Chapter 20 has no reciprocity or endorsement section, and DLT’s plumber pages list no partner states and no exam waiver. DLT administers the plumber exams itself. Irrigator and water-filtration master licenses are separate.

Tennessee does not issue a master plumber license. The state-level plumbing credentials are (1) the Limited Licensed Plumber (LLP), a personal license for work under $25,000 where the Division of Fire Prevention inspects, which the Board does not treat as a master equivalent and for which it has no exam-waiver agreements, and (2) a contractor license with the CMC-A (plumbing) or CMC (full mechanical: plumbing and HVAC) classification, issued to a business that names a qualifying agent and required for plumbing projects of $25,000 or more. CMC-A and CMC candidates need Board pre-approval ($50) before the plumbing or full-mechanical trade exam; every contractor also takes the Tennessee Business and Law exam (Prov from 2026-07-01; scores typically valid two years). Initial contractor application fee $250. The Board's trade-exam-waiver form lets a contractor whose origin board verifies a comparable plumbing or mechanical exam skip the Tennessee trade exam but not Business and Law, and it cannot be used for the LLP: Ohio plumbing maps to CMC-A, South Carolina plumbing to CMC-A, and Louisiana, Mississippi and West Virginia mechanical licenses to CMC. That waiver is contractor-to-contractor only (Ohio's OCILB listing of Tennessee as a plumbing-contractor partner is the same relationship from Ohio's side). Master plumber licenses proper exist only locally; Nashville's MPE Board issues a master plumber certificate. An out-of-state master plumber has no statewide personal recognition: to contract for $25,000 or more they need the CMC-A or CMC contractor license; to pull small-job permits they need the LLP where it is accepted, or the local master card where it is not.