The following words and terms, when used in this subchapter, shall have the following meanings, unless the context clearly indicates otherwise.(1) Installation of water treatment appliances--Includes connecting the appliances to all necessary utility connections in residential, commercial, or industrial facilities.(2) Water treatment--A business conducted under contract that requires the interpretation of analysis of water samples, including the ability to determine how to treat influent or effluent water, alter or purify water, or add or remove a mineral, chemical, or bacteriological content or substance. The term also includes the installation, exchange, connection, maintenance, service, and repair of potable water treatment equipment and appliances in public or private water systems.(3) Water treatment equipment--Appliances used to alter or purify water or to alter a mineral, or bacteriological content, or substance.(4) Water treatment specialist--A person who is licensed under this chapter to perform water treatment on a contract basis.