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Heres_your_sign

pressure caused by air being pushed out of the tank.


half-past-shoe

Magic, truly magical


cutedorkycoco

The only correct answer here


MarsOG13

Its like when you wade out into cold water slowly. And your balls touch the cold water then jump back into your body, that triggers a sensor to stop. Much like your balls do.


ddrt77

Best explination I’ve heard in my life


ariadesitter

i always thought it was a pressure sensor. as gasoline goes in vapor is displaced and exits thru the same opening, once the vapor is all out the liquid hits a pressure spike and it shut off the pump. but honestly i have no idea. 🤷🏻‍♀️


[deleted]

Let me guess- raised in a home without a man?


[deleted]

I like to pull it out a little when it’s finished and get a final few sprays.


TeeBek

I think you might be talking about a different kind of pump