"Responsible licensed master" means the licensed water conditioning master or licensed master plumber designated in writing by the water conditioning contractor in the water conditioning contractor's license application, or in another manner acceptable to the commissioner, as the individual responsible for the water conditioning contractor's compliance with sections 326B.50 to 326B.59, all rules adopted under these sections, the Minnesota Plumbing Code, and all orders issued under section 326B.082.
"Single family residential unit" means a building or portion thereof which is arranged, designed, used or intended to be used for residential occupancy by one family, but not including a motel, hotel or rooming house.
"Water conditioning contractor" means a person who performs or offers to perform any water conditioning installation or water conditioning servicing, with or without compensation, who is licensed as a water conditioning contractor by the commissioner.
"Water conditioning installation" means the installation of appliances, appurtenances, and fixtures designed to treat water so as to alter, modify, add or remove mineral, chemical or bacterial content, said installation to be made in a water distribution system serving a single family residential unit, which has been initially established by a licensed plumber, and does not involve a direct connection without an air gap to a soil or waste pipe.
"Water conditioning journeyman" means an individual, other than a water conditioning master, who has demonstrated practical knowledge of water conditioning installation and servicing, and who is licensed by the commissioner as a water conditioning journeyman.
"Water conditioning master" means an individual who has demonstrated skill in planning, superintending, installing, and servicing water conditioning installations, and who is licensed by the commissioner as a water conditioning master.
"Water conditioning servicing" means the servicing (including servicing prior to installation) of a water conditioning installation.