Lochinvar & A.O. Smith 100277962 Cover

The Lochinvar & A.O. Smith 100277962 Gasket Manifold Cover is a vital OEM component designed to provide a high-integrity seal for the manifold cover assembly. This technical manifold cover gasket is the direct performance replacement for the obsolete part number 100060121 (also cross-referenced as GKT20172K and GKT20172). Engineered for high-temperature environments, this part is specifically validated for use in Lochinvar Crest FBN(L) 751-2001 heating boilers and compatible A.O. Smith high-efficiency water heaters. As a veteran technician, you know that maintaining a precise atmospheric seal at the burner and manifold interface is non-negotiable for preventing combustion gas bypass and ensuring 96% thermal efficiency. This part ensures the structural integrity of the combustion chamber and prevents pressure drops that trigger nuisance "loss of flame" or "air pressure switch" fault codes. Weighing approximately 0.29 lbs, this kit is essential for any scheduled boiler maintenance or burner assembly overhaul involving the FBN 0751-2001 series.

• Direct OEM Compatibility: Engineered as a precise direct replacement for 100060121, ensuring zero-clearance fitment without the need for field modifications.
• Combustion Integrity: Prevents hazardous flue gas leakage and maintains the pressurized seal required for stable flame rectification in Crest FBN heating boilers.
• Heat Resistance: Manufactured from advanced gasket materials designed to withstand the thermal cycling associated with high-modulation HVACR operations.
• System Efficiency: Restores proper manifold pressure and airflow balance, reducing the risk of rough ignition or soot accumulation on the flame rod.

Does this part replace the old GKT20172K series?
Yes, the 100277962 is the current manufacturer-authorized replacement for the legacy 100060121 and GKT20172 series gaskets used in manifold cover kits.

Which boiler models is this gasket compatible with?
This gasket is primarily utilized in Lochinvar Crest models ranging from FBN0751 to FBN2001 and FBL0751 to FBL2001, as well as select A.O. Smith light-duty commercial units.

Should I replace this every time I open the manifold?
Industry best practice for HVACR contractors dictates that manifold gaskets should be replaced whenever the burner or blower assembly is removed to ensure a reliable seal and avoid potential combustion leaks.

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.