On my X-139, it was under the low point of the tank -- I had to crawl underneath to get to it. I say "was" because I took it out -- I had the dealer reposition the pump pickup tube so that it would not run dry when there was still 5 gallons in the tank. I also tilted the tank by putting a piece of 2x2 lumber under the front lip of the tank, thus putting the drain area at the lowest end of the tank.
Draining fresh water tank
Linear Mode
