2X Better Blockage  CLEAR 2 O ®  DirtGUARD™ Replacement Sediment Pre-Filter will be the first line of defense capturing and removing particulate matter like dirt, silt, sand and debris from your water.  D irtGUARD™  Solves RVers’ Most Common Filtration Issue – Sediment! 10 Micron Polyethylene filter provides a higher dirt holding capacity. Blocks 2X better silt, sand, sediment, rust & other particulates. Compact and durable design. Pre-filter enhances the effectiveness of inline RV Filter. Backwash extends filter life between changes. Washable and Reusable. Easy to install and replace filter. Recommend to replace filter every 3-6 months or as needed. Only fits models CPF1000 and CTFS8000. Note : Cleaning filter does not restore the original color of the filter.  Always connect to a known water source and use a water pressure regulator.  Water quality varies depending location and filter life varies.  Any particle smaller than 35 microns in size cannot be seen without magnification.