Best ways to separate diesel from water?

[Breezeblock]

I would run it through the funnel thing they work very well and then fill up your machines with a simple pump going through a water separating fuel filter to give it a really good clean

 

[Woodworks]

Filter arrived today and it works a treat if a bit slow with red mixed with water haha. With  tank tilted back have filtered 20litres but still getting some water coming out!