Water treatment to protect pipes and boilers from corrosion deposits and limescale up to 356ppm whilst ensuring valuable minerals are retained in water supply. Requires no salt treatment, and can be fitted without the need of a waste or overflow. Fully automatic operation. One cartridge change per year ensures continuous treatment. Suitable for a household of 1-3 people. Recommended for use with BWT E1 Single-Lever Filter (sold separately), to help optimise performance of the system and prevent dust particles such as rust and sand from entering the domestic water system. Fittings Supplied 1 Year Guarantee Fully Automatic Operation Suitable for Households of 1-3 Persons Fittings Supplied 1 Year Guarantee Fully Automatic Operation Suitable for Households of 1-3 Persons