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The A.O. SMITH 100108412 is a heavy duty element wrench designed for the removal and installation of water heater heating elements. With a socket length of 5 inches, this tool provides the reach needed to seat properly on element hex heads recessed inside water heater tanks. It is a purpose-built service tool used by plumbers and water heater technicians during element replacement procedures on residential and light commercial water heaters.
This wrench is suited for service work on electric water heaters where heating elements require periodic replacement due to scale buildup, failure, or as part of a system upgrade. The 5-inch socket length accommodates the typical tank wall depth encountered in standard residential electric water heater installations. It is a staple tool for plumbing contractors and HVAC technicians who regularly service water heating equipment.
Designed as a service tool for use with electric water heater heating elements in residential and light commercial applications.
Always disconnect electrical power to the water heater and shut off the cold water supply before servicing heating elements. Drain the tank to the element level before attempting removal to prevent water discharge. A licensed plumber or qualified service technician should perform water heater element service in accordance with local plumbing codes and the manufacturer's instructions.
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