Ao Smith 100305721 Powered Anode Rod System Water Heater

Product Description

The AO SMITH 100305721 is a powered anode rod system designed to protect the steel tank in residential water heaters from corrosion. Unlike sacrificial magnesium anodes that deplete over time, this system uses patented adaptive technology that continuously adjusts output current to match the local water chemistry. The result is consistent electrochemical protection without periodic anode replacement. A built-in LED fault indicator and audible alarm confirm that the system is operating correctly. The compact control box plugs into a standard 120-volt outlet, keeping the installation straightforward for licensed plumbers and water heater service technicians.

This powered anode system is suited for residential gas and electric water heaters with tank capacities between 30 and 50 gallons. It is particularly well-suited for softened water applications, where conventional magnesium anodes accelerate sulfur-related odor issues. The system is positioned as a direct replacement part for existing anode installations and is intended for professional installation in residential settings.

Key Features

• Patented adaptive technology adjusts current output to match water chemistry in real time
• Eliminates sulfur odor issues associated with sacrificial magnesium anodes
• Built-in LED fault light and audible alarm provide system status confirmation
• Plugs into any standard 120-volt wall outlet for simplified installation
• No maintenance required after installation
• Designed for softened water and standard water supply applications

Compatibility

Designed as a replacement powered anode rod system for residential gas or electric water heaters with 30 to 50 gallon tank capacities.

Installation Notes

Installation is performed by a licensed plumber or qualified water heater technician. Before servicing the water heater, shut off the cold water supply and power or gas to the unit. The hex-end fitting is installed at the anode port using standard plumbing tools. The control box should be secured near the heater and plugged into a grounded 120-volt outlet following local plumbing and electrical codes.

Technical Specifications

• End Type: Hex
• Application: Replacement Part
• Compatible Tank Size: 30-50 gallons
• Control Box Input Voltage: 120 volts
• Heater Type: Gas or Electric
• Installation Setting: Residential

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100305721