I was really disappointed to learn, when I received the unit, that the drain plug in bottom of unit is no longer available. This means you have to uninstall the unit to drain the tank. For example: to clean out any contaminants like rust from pipes and to drain water to winterize in a summer home.

Their tech service did not know that my unit, gave them the serial number, had a drain plug when I was doing some trouble shooting for a leak.

There customer service, from a sales perspective, wasvery helpful in getting me a new unit. Of course no drain plug.