Washington to Indiana: master plumber license reciprocity

Indiana has no 'master plumber' license. The top individual credential is the Plumbing Contractor license issued by the Indiana Plumbing Commission (PLA) under IC 25-28.5-1, which is held by a person who has qualified by experience and passed the Indiana plumbing contractor examination administered by PROV; this file maps it to the master level because it is the credential that authorizes a plumber to contract for and supervise plumbing work. The license is held by the individual: every member of a firm or partnership who contracts for plumbing work must hold one personally, and a corporation doing plumbing contracting must hold its own corporate license naming at least one officer or employee who is a licensed Plumbing Contractor (IC 25-28.5-1-13). The Commission also issues a Temporary Plumbing Contractor license when a contractor running a business dies or becomes unable to operate it (IC 25-28.5-1-18.5). Applications and renewals are processed in MyLicense One, and initial license issuance fees depend on whether the license is issued in an odd or even year. The reciprocity section of the statute (IC 25-28.5-1-19) applies to out-of-state master or contractor licensees in the same way as to journeymen.

Washington has no master plumber license. WAC 296-400A-010 lists every certificate the state issues (journey level PL01, residential PL02, residential service PL04, pump and irrigation PL03, domestic well PL03A, backflow PL30, and trainee), and the Journey Level Plumber certificate is the highest credential an individual can hold; the only add-on is the Medical Gas Piping Installer endorsement (MG01), which is a specialty, not a supervisory tier. Since July 1, 2021 a business that advertises, bids or performs plumbing work must hold a Plumbing Contractor license under RCW 18.106.400, but that is a business registration rather than a person-held trade license: the firm registers with the Department of Revenue, files a $6,000 surety bond, carries $250,000 combined (or $200,000/$50,000) liability insurance, pays a $148.10 license fee plus $53.20 to designate a Washington-certified plumber who works for the firm full time, and renews every two years; no exam is taken by the owner. An out-of-state master plumber therefore has nothing to transfer to at this level. To work as a plumber they obtain the journey level (PL01) certificate through the journeyman path (Idaho reciprocity or license review plus the Washington exam), and to contract they form a business and license it as a plumbing contractor with themselves or an employee as the designated certified plumber.