Set humidity to 55%, channeled the tank house to empty outside the basement, turned it on, been working like a charm since. Once it stopped with a full tank. I just checked the directions, selected "Empty Tank" and bingo, the pump empties the tank. You can see the red water level indicator decend as the tank empties. Been on full automatic since. So far the appliance works as promised. Humidity and mustiness in basement has been eliminated. A worry free, maintenance free divice. Rare in todys world of expensive applicances that crash. They dont make 'em like they used to ! We are very happy with the 70 gallon dehumidifier.