Lochinvar & A.O. Smith 100109139 Heating Element

The Lochinvar & A.O. Smith 100109139 Heating Element is a heavy-duty 240V 4500W Sandhog immersion element engineered for high-demand commercial and residential water heating applications. This screw-in water heater element features a low watt density design, utilizing a premium Incoloy sheath to resist scale buildup and dry-fire damage in aggressive water conditions. As a direct OEM replacement part, it ensures precise fitment and thermal transfer efficiency for Lochinvar and A.O. Smith water heaters, maintaining optimized recovery rates. The 100109139 utilizes a standard 1-inch NPSM thread pattern, making it a versatile electric water heater repair part for various 4500 watt heating element configurations. Techs should verify amperage draw against the water heater element wiring diagram to ensure electrical compatibility during field installation. This robust component is built to withstand the rigors of continuous cycling, providing consistent ohmic resistance and reliable heat dissipation across the internal tank environment.

Key Benefits

• Incoloy Sheath Construction: Superior resistance to corrosion and mineral accumulation compared to standard copper elements.
• Low Watt Density: Reduces surface temperature to prevent sediment "cooking" and extends the service life in hard water areas.
• Direct OEM Fit: Ensures proper clearance within the tank and matches Lochinvar 100109139 specifications exactly.
• Sandhog Durability: Designed specifically to handle dry-firing incidents better than conventional immersion heaters.

Common Questions

What are the electrical requirements for the 100109139 element?
This Lochinvar 240V 4500W element requires a 240-volt circuit and will pull approximately 18.75 amps during operation. Always verify the breaker and wire gauge are rated for this load.

Can this element be used in tanks with high sediment?
Yes, the Sandhog heating element design is specifically engineered for environments where scale and sediment are prevalent, as its low watt density minimizes mineral bonding.

Does this part include the gasket?
Standard protocol is to replace the 1-inch flange gasket whenever the immersion heater is pulled to ensure a watertight seal upon reinstallation.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.