Please Note: This product requires 3M Filter Bracket Head for operation. The High Flow Series from 3M offers the latest technology for optimal espresso flavour and machine protection. Reduces: Scale, Chemicals & Sediment whilst maintaining an ideal PH and great tasteIdeal: For water with Total Hardness up to 140 PPM (ask us for help measuring your Total Hardness)Rating: 1 MicronPre-Activated: No flushing required - upon installation - it is recommended to run 1-2 litres of water through the group to expel air from filter.Capacity: 18170 litres - suggested replacement: 12 months or 1500 kg of coffeeNSF Certified for use with coffee machines and food productsAuto-Shut Off all High Flow Filters fit the same head - these heads have an auto shut off valve for quick and easy changeover.