Mr. Squirrel, are you still filling the tank via the outside port?  I just open up the tank top, and fill from there, with my eye on the hole.  Never overflow, that way.

---- "Mike "Rocket J Squirrel"" <camping.elliott@GMAIL.COM> wrote:

> There are three openings on the top: water out (from the pump),
> electricity in (to the pump), and a mystery hose that goes forward
> behind the refrigerator to places unknown and there's presently too much
> crap under there for me to want to find out. I presume it's a
> breather/overflow line for the tank and possibly dumps into the sink
> drain line? Just a guess.

Would not be good, as it would be a pathway for nasty stuff from the sink, or at least microbes from the nasty stuff, to get to the water tank.  I need to check this out to make sure there is no such connection.  Shades of sewer/potable water cross connections in a house or municipal piping system!

David McNeely