Apparatus, method and systems for providing selectable level carbonated water

A system for on-demand, selectable level carbonated water production comprising:

• a first carbonating unit having a volume with an inlet in communication with a source of carbonating gas and noncarbonated water and an outlet for discharging carbonated water;
• a second carbonating unit having a volume with an inlet in communication with a source of carbonating gas and noncarbonated water and an outlet for discharging carbonated water;
• an agitator housed within the volume of the first and second carbonating unit;
• a first variable speed actuator operably connected to the agitator in the first carbonating unit and a second variable speed actuator operably connected to the agitator in the second carbonating unit;
• and
• a controller operably connected to the first and second variable speed actuator;
• wherein the controller adjusts the operating rate of the first carbonating unit and the second carbonating unit based, at least in part, on temperature or pressure associated with the sources of carbonating gas and noncarbonating water of the first carbonating unit and temperature or pressure associated with the sources of carbonating gas and noncarbonated water of the second carbonating unit.