The Hydro Tek Spot Free Systems purify tap water to achieve spot free cleaning and rinsing. Simply connect garden hose and you are ready to clean. Insert the large capacity deionized cartridges into the filter vessel for up to 1000 gallons of ultra pure water down to 3ppm when inlet water is less than 150ppm. Hydro Tek Spot Free systems have compact, stainless rustproof frames. Spent dry filters are disposed of and replaced, no more bulky DI bottles to lease or trying to find a place to buy DI water. The Spot Free Rinse units offer Hydro Tek quality and reliability for the spot free rinse market.