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Tractor hydraulic quick connect hoses can handle large amounts of liquid without letting air in, people have used these common connections on trucks and tractors to move engine coolant in a ground loop or in an on demand hot water heater to preheat an engine, connecting it after the engine is warm would pull the heat out of the engine as well.
By "plugging" your car in to your house, you could preheat your engine, saving gas and when you return you could put that expensive heat back in to your house, where it will be enjoyed by you instead of slowly lost from your car.
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