9-3 Coupe (9400) L4-2.0L Turbo (B204) (1999)
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Non-Return Valve: Description and Operation
Non-Return Valve, Fuel Tank
Non-return Valve, Fuel Tank
The non-return valve is normally closed and permits flow only towards the tank.
In this way, the valve prevents "back-spit" when the filler nozzle closes.