Thats right Bird. It's not only more important with gas because in your truck bed or car etc., with no ground (earth, not your car battery) a static charge can be developed via the pump/hose, but pumping into a plastic container can as I understand enhance that static charge. The unit I ordered comes with a ground wire so that if pumping gas into anything, you could ground it. Gas station pumps are grounded. Aviation fuel trucks always ground to earth as well when filling planes. Rat...