Doulton W9120145 Rio 2000 Replacement, 6-Pack Rio2000 6 Pack is the replacement filter pack for the Rio2000 module, sold complete in sets of six for ease of replacement The Doulton Rios unique 6 element filter module is designed to be fitted to the main water supply to provide larger volumes of healthy, clean water Doulton W9120145 cleanable filter elements are designed toreduce suspended solids, pathogenic bacteria and cysts