Why do gas stations have clip on nozzles?
Why do gas stations have clip on nozzles? So nozzles that attendants use have clips that allow the gas to flow even if they leave the car. But at stations that permit self-service, the clip on the nozzle has been removed so you're forced to hold the nozzle while you fill up. Why does the gas nozzle shut off when the gas tank is full? This causes the spray from the nozzle to no longer be uniform (which is how we design our fuel fillers), causing turbulence in the fuel filler pipe, bouncing back, and momentarily blocking the venturi on...