-HydroPower Ultra professional window cleaning equipment is the easiest and most efficient system on the market. -Longest lasting pure water system with 30% more pure water output. -Pure water is the fastest and most efficient way to clean outdoor glass surfaces, leaving a spot-free finish. -Cleans up to five stories safely from the ground with a local water source and no ladders! -Exceeds standard DI filter efficiency, performance, workflow and comfort thanks to these features: FloWater Technology ; QuickChange Resin Bags ; FastLock Opening. -Produces commercial grade zero TDS (Total Dissolved Solids) purewater for site glass cleaning and other applications that utilize deionized water. -QuickChange Resin Bags allow users to change resin bags in less than 30 seconds. -FloWater Technology is an innovative water distribution system that ensures more efficient water flow through the entire vessel, improving resin efficiency and increasing its lifetime. -FastLock Opening for easy and quick opening and locking of the filter. Safe, self locking mechanism features a pressure release valve -Resin replacements use part #70-215 or 70-216 (green lids only)