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The AO SMITH 100112660 is a pressure switch designed for use in water heating systems where accurate pressure monitoring is required to maintain safe and reliable operation. This component senses system pressure and signals the control circuit to allow or interrupt operation based on preset thresholds. It measures 0.99 inches and is a direct OEM-style replacement part. Licensed plumbers and HVAC technicians are the typical installers of this component during routine maintenance or system repair calls.
This pressure switch is intended for use in residential water heating applications where the control system depends on verified pressure conditions before allowing burner or heating element operation. It is suited for installation in systems requiring a compact switch profile, making it appropriate for space-constrained equipment configurations typical in residential settings.
Designed as an OEM-style replacement pressure switch for AO SMITH residential water heating equipment. Verify the part number against your unit's service label or parts list before installation.
Installation should be performed by a licensed plumber or qualified HVAC technician. Before servicing, shut off the gas supply or electrical power to the water heater and allow the system to depressurize fully. Follow all applicable local plumbing codes and manufacturer service documentation when removing the old switch and connecting the replacement. Do not restore power or gas until all connections are confirmed secure and the access panel is in place.
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