Replacement Pre-Filters for Reverse Osmosis & Water Filtration Systems - Pre-Filters Only Replace filters and membrane regularly to experience the Highest Quality Water and Optimum Performance from your RO system. Includes 5 Micron Sediment Filter to Remove Dirt, Rust, and Sediment from water, as well as (2) Carbon Block Filters to remove chlorine, taste and odors. rdering Filters in Packs gives you Substantial Savings compared to ordering individually. Use with AMI AAA-1005, AAA-505, or any 5-stage Home RO with Standard Housings. Note: This filter kit contains pre-filters only, intended for use by system owners who change their pre-filters more frequently than their post filters.