Water pre-Filters are designed to help increase the clarity of the water used in your entire home by reducing sediment such as rust and silt particles and extending the life of your household appliances that use or process water. Water pre-Filters also prepare your water for filtration and are effective at optimizing the life of your Final Filters, which are designed for point-of-use filtration at the sink, refrigerator or shower. Final Filters work to improve the taste, odor and clarity of your water and can also reduce harmful contaminants. There are a number of reasons youâ€™ll want to use both types of nano water filters in your home. Using a combination of both types of nano water filters will help optimize the filtration quality of your water and improve the overall taste of your food & beverages.