[Lynn Eades]

Tom, the pick up pipe lines up exactly with the drain plug the drain plug and casting function as a sump which the pick up pipe pokes into. Normally the end of the pipe is blanked off and the fuel is drawn through the screen through a hole in the side of the pipe.
As a note the Australians added a ring to the plug casting which acts as a barrier to prevent water in the bottom of the tank from getting into the area that fuel is drawn from. A good idea I thought.