Time to be eco-friendly! Fuel spillage is expensive. Fuel spillage is deadly to fragile rivers, lakes and waterways. Fuel spillage is also avoidable. When installed in the fuel tank vent line, Parker Racor's Fuel/Air Separator diverts fuel that becomes forced into the line. The air is vented and fuel is returned to the tank, eliminating discharge. You could save up to half a gallon of fuel every refueling, AND save your environment... a Win/Win.