In the land of vacation boat country where water in our fuel is our biggest boat problem, I have four clearish five-gallon plastic cans to drain contaminated fuel into, let the water separate, and then to refill boat tanks without the water.
I use a simple 12v mitsubishi electric fuel pump wired to a household wall switch attached to a pair of alligator clip 12v battery leads all mounted to a wood block with 12' of fuel line on both ends of the fuel pump. My defueling pump is the most lent out tool I have.
Thankfully, on my Hough Payloader, there are two fuel drain plugs located on either side of the machine at the lowest part of the 80-gallon fuel tank that can simply be used to drain water out until nothing but diesel is flowing.