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The AO SMITH 100110746 is a magnesium anode rod designed to protect water heater tanks from corrosion through electrochemical action. The rod sacrifices itself over time, attracting corrosive elements in the water supply before they can attack the steel tank lining. At 35 inches in length with a 1.315 inch outer diameter and a hex end for wrench access, this rod installs directly into the anode port on compatible water heaters. It is a direct replacement part intended to restore corrosion protection on units where the original rod has been depleted. Plumbers and water heater service technicians are the primary installers.
This anode rod is suited for residential water heater applications where the original factory rod has reached the end of its service life. Routine anode inspection and replacement is standard preventive maintenance on tank-style water heaters, typically performed every three to five years depending on water quality. Hard water and softened water conditions accelerate rod depletion and may require more frequent service intervals. The hex end design allows removal and installation using a standard socket wrench without specialty tooling.
Designed as an OEM-style replacement anode rod for compatible AO SMITH tank-style water heaters. Verify anode port thread size and rod length against the existing unit before installation.
Installation should be performed by a licensed plumber or qualified service technician. Before servicing, shut off the cold water supply and disconnect power to electric units or set gas valve to pilot on gas units, then relieve tank pressure through the T and P valve. A 1-1/16 inch socket and breaker bar are typically required for removal of the existing anode rod. Apply thread sealant tape to the rod threads before installation and do not overtighten, as the magnesium rod material can be damaged by excessive torque.
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