The TastePURE RV Sediment Pre-Filter provides the first stage of protection against dirt, silt, sand, etc. from your RV's fresh water supply. It helps extend the life of your inline RV water filter by blocking particulates that can clog the filter. This pre-filter removes particles greater than 20 um and fits Camco brand and other brand standard inline water filters. The pre-filter's compact, space-saving design allows easy storage when not in use ideal for RVs. This long-lasting, single use pre-filter is intended to last the duration of your inline RV water filter.