Tennessee to South Carolina: master plumber license reciprocity

South Carolina has no license titled 'master plumber'. The highest person-held plumbing credential is the Contractor's Licensing Board's Qualifying Party certification in the Plumbing (PB) classification of the Mechanical Contractor license. The individual passes the South Carolina plumbing technical exam through PSI (unless a listed waiver exam applies) and the South Carolina Business Management & Law for Commercial Contractors exam, documents two years of full-time experience within the past five years in the classification (or a PHCC Academy of North Carolina plumbing apprenticeship certificate), and is certified as the qualifying party for a licensed entity (which may be a sole proprietorship). The certification stays with the person; Doc. 168 states the certified qualifying party 'is not a licensed contractor' and the entity holds the license. The license fee is $350, with a financial statement or surety bond sized by mechanical group (Group 2, jobs to $100,000: working capital $10,000 or net worth $15,000, or a $15,000 bond). Work over $10,000 requires this license under § 40-11-30. Licensees from other states take the South Carolina plumbing technical exam and the Business Management & Law exam.

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.