22 3200 - Domestic Water Treatment Equipment

See also:
22 3100 - Domestic Water Softening
22 3240 - High Purity Water Systems

American Ultraviolet Company
Amiad Filtration Systems
Amtrol
Aquathin Corporation - Water purification systems for residential, commercial, laboratory markets, both domestic and international.
Culligan International Company
EcoWater Systems - NorthStar
Environmental Water Systems
Kinetico
Moen - Puretouch
Pure Aqua - Reverse osmosis systems, automatic media filters, cartridge filters, water softeners.
UV Resources (UVR)
Waterboss - Water softeners, water filtration systems, water filters and reverse osmosis water filters.
Whirlpool Corporation