Ao Smith 100109139 Screw-in Water Heater Element 240V 4500W

Product Description

The AO SMITH 100109139 is a screw-in water heater element designed for residential and light commercial water heater service. Rated at 240 volts and 4500 watts, it features an Incoloy nickel-alloy sheath that operates at low watt density to reduce scale buildup and extend service life compared to standard copper elements. The element ships with a replacement gasket included. Licensed plumbers and water heater technicians install this part as a direct service replacement when an existing element fails or tests open on a resistance check.

This element is suited for residential tank-style electric water heaters and light commercial units that accept a standard screw-in element configuration. Low watt density operation makes it a practical choice for installations with harder water conditions where scale accumulation shortens element life. The included gasket simplifies the service call by eliminating a separate parts trip.

Key Features

• Incoloy nickel-alloy sheath resists scale and corrosion for extended service life
• Low watt density design reduces surface temperature and mineral buildup
• Rated 240 volts and 4500 watts for standard residential and light commercial applications
• Screw-in mounting configuration for straightforward installation
• Gasket included — no separate seal required at time of service

Compatibility

Designed as an OEM-style screw-in replacement element for residential and light commercial electric water heaters accepting a standard screw-in element fitting.

Installation Notes

A licensed plumber or qualified water heater technician should perform element replacement. Before beginning, shut off electrical power to the water heater at the breaker and close the cold-water supply valve. Drain enough water from the tank to bring the level below the element port before removal. Follow all applicable local plumbing codes and the water heater manufacturer's service documentation during installation.

Technical Specifications

• Voltage: 240 volts
• Wattage: 4500 watts
• Element Type: Screw-in
• Sheath Material: Incoloy nickel alloy
• Gasket Included: Yes

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100109139