How Does a Gas Pump Know When Your Tank Is Full?!

Nobody touches the nozzle, yet it clicks off right when the fuel reaches the top. What tells a gas pump to stop? There is no computer, battery or electronic sensor in your tank doing the job. The answer is a clever mechanism hidden inside an ordinary fuel nozzle, and it uses little more than moving fuel, air and pressure. Follow the fuel from the moment you squeeze the trigger to the moment it snaps back, and find out why some pumps keep clicking off before your tank is actually full. Before watching, what did you think made the nozzle shut off: a sensor in your car, or something in the pump itself? If you learned something new, give the video a like and subscribe for more everyday mysteries explained. #HowItWorks #GasPump #Engineering #Science #CarTips