Doulton W9381000 High Flow Multi Candle Filter ModuleThe Doulton W9381000 Rio 2000 Multi Candle Module of six high flow ceramic filters designed for the main water supply or cold water pipe underneath the kitchen counter. This module fits most industry standard 10" Big Blue Housings as well as Doulton Housings. These candles are all self sterilizing and re cleanable, so they you can always count on them to provide only the cleanest water. The multiple filters will supply large volumes of healthy, clean