Fuel contaminated with water can cause major damage to fuel systems. This certainly applies to the current high-pressure common rail systems. The micfil WaterSeparator (WS) removes up to 99.2% of water and solid particles up to 10 microns from even the most contaminated fuel. - Preventing fuel and water related malfunctions Removal of solid/semi-solid impurities such as dirt, rust and sludge Extending the overhaul time and service life of the engine Compliance with emission standards