Re: Flame arrestor?
I wouldn't assume that all commercial fuel pumps are grounded. In aviation, we ground the pump or fueling truck to the aircraft before we start fueling. You never see folks do this at a gas station. The little metal nozzle with the spring loaded flap acts as a spark arrester in the modern tanks.
That filter/spark arrester should be in the tank when fueling or it defeats the purpose.
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