The Classeq WS12-SK is a powerful water filtration system which helps to reduce limescale entering your Classeq warewasher. Using an effective base exchange system, limescale is significantly reduced, meaning better quality water and improved washing results. Not only that - if you're not using a water softener in a hard water area, professional washers can quickly become clogged up, potentially invalidating warranties and reducing washing effectiveness. The WS12-SK is a powerful solution for smaller undercounter washers.