and the system does not present a fire hazard the use of this transformer makes the system of the present invention exempt from certain wiring nec rules as current is limited with such low wattage current is only independently provided to one tank of the series of tanks 10 at a time at least one embodiment of the present invention is designed for use with freestanding or wall mounted sinks it is an in wall installation and fits between studs in conventional 2 u00d7 4 wall construction other embodiments of the present invention are designed for use in vanity or cabinet installations where the location inside the cabinet under the sink is most appropriate all embodiments of the present invention are envisioned to operate on low voltage output from a class ii transformer and only draws a maximum of 40 watts other wattages may become available in low voltage systems similar to class ii it is envisioned that a switch available to the user to set the specified design temperature for use the switch preferably enables the target design temperature to be set to 110 120 125 or other values the microprocessor 120 is configured to raise the temperature of the water within the highest priority tank first and preferably overheats the water slightly such that it may be allowed to cool slightly as power is subsequently diverted to the heating coil 60 of the next priority tank temperature ranges are preferably used in lieu of a specific target temperature the temperature of the tanks is preferably detected externally via the temperature sensors 70 as the tanks of the series of tanks 10 are preferably made of stainless steel heat is.