Lochinvar & A.O. Smith 100208100 Gasket

The Lochinvar & A.O. Smith 100208100 2" Flange Gasket is a high-performance OEM replacement part engineered for demanding boiler and water heater applications. This 2-inch thick flange gasket is specifically designed to create a reliable, leak-proof seal within the ASME-rated heat exchanger assemblies and pool heater manifold systems. Built to withstand the thermal cycling typical of EnergyRite series heaters, this industrial-grade HVAC gasket ensures long-term integrity at critical connection points. For technicians performing routine maintenance or manifold repairs, using this genuine Lochinvar part (cross-referenced as 100146522, GKT2413, and GKT2413K) is essential for maintaining the pressure vessel's certification and preventing bypass or external leaks. This HVAC flange seal is manufactured from durable synthetic materials optimized for high-temperature resistance and chemical stability in hydronic and pool heating environments, providing a superior fit compared to generic aftermarket alternatives.

Key Benefits:

• OEM Compatibility: Precision-engineered for Lochinvar EnergyRite (ER) and EnergyRite 2 pool heaters, including ASME-compliant residential and commercial models.
• Enhanced Sealing: High-density synthetic construction provides the necessary compression for 2-inch flange connections, even under high-head pressure.
• Cross-Series Utility: Directly replaces several legacy part numbers, simplifying inventory for service trucks working on varied A.O. Smith and Lochinvar equipment.
• Thermal Stability: Specifically rated for the temperature fluctuations found in high-efficiency pool heaters and boiler manifold assemblies.

Common Questions:

Is this gasket compatible with the EnergyRite ASME models?
Yes, the 100208100 is the designated OEM replacement for 2-inch flange connections on Lochinvar EnergyRite and EnergyRite 2 heaters, specifically those requiring ASME-grade hardware.

What older part numbers does this gasket replace?
This current part number replaces several older revisions, including 100146522, GKT2413, and GKT2413K. It is designed to meet or exceed the original specifications of these legacy parts.

Why is a thick gasket required for these flanges?
The thickness of this 2" flange gasket is critical for compensating for minor surface irregularities in the cast iron or bronze headers, ensuring a positive seal that prevents water damage to the surrounding appliance components.

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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.