Water and diesel fuel - inseparable "friends", although "friendship", this is highly questionable. In diesel fuel and other contaminants are present, but it delivers more than just water problems: conventional filters do not detain her, and separator filters, came to replace septic tanks and designed to separate water from fuel, do it is not always as good as we would like.
Most filters on the outside look the same. What is important is what is inside. Cummins Filtration has developed a synthetic filter media StrataPore ™ exclusively for optimum efficiency and longer life.