Description:Culligan RV-800 RV and Marine Water Filter Cartridge Life: The Culligan RV-700 filter is the replacement filter for the Culligan RV-800. The RV-700 should be replaced if you notice tastes and odors returning to the water or the water pressure is greatly decreasing. The Culligan RV-700 water filter life will depend on the quality of your water and your water usage.Technical Information: