WATERRO Big Blue 20" Water Softening Cartridge for 20" BB Housing The WATERRO Big Blue 20" Water Softening Cartridge is designed to reduce water hardness using high-quality ion exchange resin. It effectively reduces calcium and magnesium ions, helps prevent limescale deposits and protects the water supply system and household appliances. The cartridge is compatible with all standard 20" Big Blue filter housings and is suitable for private homes, apartments, offices, restaurants, hotels and industrial water treatment systems. Key benefits High-quality ion exchange resin Effectively reduces water hardness Reduces calcium and magnesium ions Prevents limescale deposits Protects boilers, water heaters and household appliances Improves detergent efficiency Large 20" Big Blue filtration capacity Compatible with all standard 20" Big Blue housings Suitable for domestic and commercial use Long-lasting and reliable operation Applications Suitable for whole-house water filtration systems, boilers, water heaters, coffee machines, dishwashers and washing machines, restaurants, hotels and industrial water treatment systems. Technical specification Parameter Value Filter type Water softening cartridge Size 20" Big Blue Filter media Ion exchange resin Function Water softening Intended for Cold water Compatibility Standard 20" Big Blue filter housings Package contents 1 × WATERRO Big Blue 20" Water Softening Cartridge for 20" BB Housing Choose WATERRO to effectively reduce water hardness, prevent limescale formation and extend the service life of the entire water system.