How does a gas pump know when to stop?

How does a gas pump know when your tank is full—and why does it suddenly click off by itself? The answer is surprisingly simple. A gas pump doesn’t communicate with your car, read your fuel gauge, or even know how large your tank is. Instead, the automatic shutoff depends on a tiny sensing hole near the tip of the nozzle. In this episode of Take Rate Research, we break down what happens inside a gas pump nozzle, how the Venturi effect creates low pressure, why rising gasoline changes the airflow inside the nozzle, and how that pressure change mechanically triggers the valve to snap closed. We’ll also explain why a gas pump sometimes shuts off before your tank is actually full. It’s a clever mechanical system hiding inside something millions of people use every day. Take Rate Research explains the hidden systems, infrastructure, technology, and businesses behind everyday life. Subscribe for more short explainers answering one question at a time. #GasPump #HowItWorks #Engineering #Explained #TakeRateResearch