The Dieselcraft Fuel Purifier is a simple one-step unit that removes 99% of the water and 95 to 98% of heavy particles. Unlike all other products on the market, the Dieselcraft Fuel Purifier performs its function without the use of a replaceable, changeable or cleanable filter element. This is the ONLY unit with a bed of activated alumina to help remove water and contamination. The Dieselcraft Fuel Purifier delivers cleaner fuel and greatly reduces filter clogging by reducing bacterial growth.