Grey Tank Overflow?

[Hoffman]

If your AutoFill valve is not closing correctly, i could see how your fresh tank could get overfull and then who knows what. On mine there is an overflow tube coming out of the manual fill tube, which is also where the autofill line dumps into the manual fill tube. But for that overflow tube to flow over, the tank level would have to be several feet above the top of the fresh tank. Which is almost the level of the dishwasher.

[Fratto]

Thanks Joe, you may be on to something here. All of this is behind a panel that also has the outside faucet, pressure guage etc. So getting the access panel off is a bit of a project. I will add this to the list!