Water conditioning

A license is required for a water conditioning installer or contractor. Licensed water conditioning persons can only install and service water conditioning equipment in single-family dwellings. A water conditioning installer's or contractor's license must be renewed annually and should be carried at all times on a work site.

The state may take action against a water conditioning installer or contractor who does non-complying work. Possible actions against water conditioning installers or contractors include invocation of a performance bond for failure to perform contracted work, or plumbing code compliance bond to correct non-complying work or administrative penalties that may result in monetary fines up to $10,000 as well as licensure suspension or revocation penalties.

More information about exams, including exam dates and locations

Business and contractor license and registration fee table

Applications and forms

Water conditioning license exam application

2012-2013 water conditioning contractor license application packet

License address change

Recent plumber licensing changes

License period extended to two years (plumbing and water conditioning)

E-Licensing surcharge is in effect (PDF)

Please Note: The Department of Labor and Industry does not accept cash as payment for licenses, inspections, copy requests and other DLI services. Accepted methods of payment include checks, money orders and electronic payments that can be made through the DLI Web site.