Oil Tank Dryer / Water Remover. Removes harmful water from Diesel, Petrol, Bio-Diesel & Fuel Oil Water in your oil tank affecting performance Add this to mop it up! Simple and easy to use! The Tank Dryer is a fuel tank water absorber, which has been developed in response to the increasing concerns regarding water contamination of fuel. By checking for, and removing any unwanted water, the Tank Dryer reduces the damaging impact that this contamination has on machinery and vehicles. The Tank Dryer, or tank sock as it is often referred to, contains highly absorbent silica gel, which when lowered into the tank absorbs up to 350ml of water. Comes with a 2 m attached cord - very quick and easy to use Instructions are included - simply lower tank dryer through the fill point or inspection chamber of your tank, letting it sink into the place at the bottom of your tank and secure using the attached cord. Fits in most 2 inch Fill Points on both plastic and steel tanks Suitabl