Originally Posted by rwidman
What are you going to do about the diesel fuel pouring out once you start drilling until you finish and get the fitting installed?
OK, this is a bit off topic, but some may find it of interest.
I have known mechanics who apply a shop vacuum to the vent port of a diesel fuel tank
while changing a valve at the bottom of a tank with a great deal of fuel in the tank. Two things I find amazing are: Air enters the opening at the bottom of the tank with no fuel leaking out with the valve removed, and the air with diesel fumes does not ignite when passing through the vacuum.
And I would add: Don't try this at home! Maybe they used an ignition proof shop vacuum, and know the vacuum power required for the depth
of fuel and size of the valve.