IRIS REPLACEMENT CARTRIDGE for WaterScience IRIS - WMF 617 Replacement Cartridge for WaterScience IRIS WMF 617 washing machine filter Cartridge life of up to 6 months for top load and up to 9 months for front load (Actual life depends on usage and water quality) Easy 3 minute DIY installation/cartridge change. No plumber needed Reduces limescale deposits on your drum and heating coil reducing maintenance issues, breakdowns and extends the life of your new washing machine Aids optimal detergent usage ensuring that fabrics retain color and softness Fits all standard automatic washing machines. Easy 3 minute DIY installation. Complimentary installation kit included. No plumber needed Ideal for washing machines installed indoors with no exposure to sunlight