Originally Posted by Oren Grad
Not sure I understand this. Do you mean that you're leaving the drainage spigot - in the bottom middle of the end of the unit, on the end with the controls - open?
There is an overflow outlet up high on the back of the unit so it can't be overfilled. If you set it up to take incoming cold water, or add water manually, this prevents overflow.
Jerold Harter MD