Predicting remaining useful life of a water heater storage tank

A non-transitory computer-readable storage medium having a set of computer-executable instructions stored thereon, execution of which, by one or more processing devices, causes the one or more processing devices to perform operations for predicting the remaining useful life of a water heater storage tank, the operations comprising:

• estimating, using an algorithmic calibration process and based on measured water hardness or pH of water stored in the water heater storage tank, an anodic current range for a corrosive current flowing between the water heater storage tank and an anode rod inserted into the water heater storage tank;
• periodically measuring respective corrosive current values;
• calculating a rate of reduction of the corrosive current based on the respective measured corrosive current values;
• estimating, based on the calculated rate of reduction of the corrosive current, a remaining useful life of the water heater storage tank;
• and
• transmitting an alert indicative of the remaining useful life of the water heater storage tank based, at least in part, on the calculated rate of reduction of the corrosive current.

A water heating system comprising:

• a water heater storage tank;
• an anode rod inserted into the water heater storage tank;
• and
• corrosion prediction circuitry in electrical communication with the water heater storage tank and the anode rod, wherein the corrosion prediction circuitry is configured to:
• estimate, algorithmically and based on measured water hardness or pH of water stored in the water heater storage tank, an anodic current range for a corrosive current flowing between the water heater storage tank and the anode rod;
• periodically measure respective values of the corrosive current;
• calculate a rate of reduction of the corrosive current based on the respective corrosive current values;
• estimate, based on the calculated rate of reduction of the corrosive current, a remaining useful life of the water heater storage tank;
• and
• transmit an alert indicative of the remaining useful life of the water heater storage tank based, at least in part, on the calculated rate of reduction of the corrosive current.