Longest lasting pure water system with 30% more pure water output. Exceeds standard DI filter efficiency, performance, workflow and comfort. Produces commercial grade zero TDS (Total Dissolved Solids) pure water for site glass cleaning and other applications that utilize deionized water. Water Filters Type: Resin Window Cleaning Filter; For Use With: Unger HydroPower System Small Tank; Filtration: Minerals From Tap Water.