Capt.Bill11
Guru
It was just a joke.
Can someone enlighten me as to where this idea of sucking diesel from boat tanks from a tube that comes down from the top, comes from..? Thereby guaranteeing the goop that forms when some fuel sediment and water, which sinks to the bottom, slops around long enough to emulsify into a nasty sludge that can then block filters if enough gets stirred up, then sucked up. Capt Bill will probably have an answer, I guess. But will it be a good answer..?
Well let's see, the fuel pick up comes off of the top of the tank on most boats for a safety reason. To prevent a catastrophe loss of fuel in the event a feed valve/fitting located at the bottom of a tank was to be damaged or broken off.
The tube in a top feed tank should not go all the way to the bottom of the tank. But stop several inches from the bottom.
A property designed tank should have a stripping port located at the very bottom of the tank, preferably at a low pint sump, where you can drain out any water and check for contamination.