Clean and soft water with the deionisation filter cartridge from Aquaphor Filter charged components such as ions and salts from the water with the effective K9 (DDC) deionisation filter cartridge from Aquaphor's high quality industrial equipment collection. The robust deionisation cartridge is designed for the Aquaphor Crystal DI PRO water softener system, which requires two of these pre-filters. Sturdy—made of high-quality plastic with high temperature and pressure resistance Powerful—designed for a maximum operating pressure of 6.5 bar / 0.63 MPa Durable—operating life of up to 18 months or 100 L Simple—quick and easy to change out cartridge without tools Compatible—for use with the Aquaphor Crystal DI PRO water softener system