Do you need a fuel tank vent?
Do you need a fuel tank vent? Your tank has to breathe. In order to breathe, your tank must have a vent somewhere that will relieve both vacuum and pressure. Gasoline expands in volume as it warms up and shrinks in volume as it cools down. The fuel level of your tank changes throughout the day, even if you are not driving it. Are vented fuel tanks dangerous? It is these changes in volume due to temperature changes that make gas tank venting necessary.” Higher pressure can lead to dangerous conditions like tank bulging, fuel line leaks, fuel pump problems,...