18 GPM, Hydrosorb Filter, Water Absorbing, Helps To Contain Water Or Microbial Contamination, Conditions Visible Through Obvious Discoloration Or The Presence Of Fungi In The Fuel, Particulate Filters Are Suited To Handle Contamination Problems Caused By Dirt, Silt & Corrosion, May Be Used With Alcohol & Alcohol Fuel Blends, Pre-Filtering Keeps Your Fuel Cleaner & Helps Your Engines Operate More Efficiently.