Rudderless,
Hotdog, maybe you should learn where it is sucked from and why the attitude of the aircraft could play a roll after fuel had settled for some time and not so quickly take news reports as gospel.
I know precisely where the fuel boost pumps are situated in the tanks and fully understand the effects of attitude. However, unless Mr Purvinas has been misquoted by the press, he is misinformed. Water does not float on top of fuel. SG of water=1.0, SG of A1 at the temperature you can expect after a long flight probably 0.82.