Gentleman, we deal with planes and water in the tanks is a problem  unlike in automobiles. One boat builder had to pay big repair bills on  many diesel engines because somebody installed the filter after the electric pump. Any water that entered the pump was pulverised and forced  through the fuel filter. That caused rusting inside the injectors, the high pressure pumps etc. I'm using an oversize canister fuel filter (looks like a large oil filter) with drain on the bottom. It is in the lowest point of my system and gravity fed by 3/8" aluminum tubing.
Buly