I bought a used 1999 unit this year, so I am winterizing it for the first time. Unfortunately xplorer as it was in 1999 no longer exists, and I have not been able to get my questions answered from anyone there. I have an owners manual and it is very thorough, except for how to drain the fresh water tank. There is a drain on the bottom of the tank, but no valve anywhere that I can see. Can anyone help me out with this question. I drained the tank by turning on the pump and opening a line drain and emptying it that way. Who knows, maybe that is the way to do it. Seems kind of strange though with a drain in the tank.