Lochinvar & A.O. Smith 100208321 Rubber Grommet
For field technicians and mechanical contractors maintaining high-efficiency systems, the Lochinvar & A.O. Smith 100208321 Rubber Grommet is a critical OEM boiler part designed to ensure a secondary airtight seal for flue sensor assemblies. This high-temperature HVAC part is engineered specifically for Lochinvar Knight and A.O. Smith water heater units, including the widespread KH, KHN, and WHB fire tube boiler series. Constructed from a resilient EPDM-based rubber compound, this replacement water heater grommet provides essential vibration isolation and prevents hazardous exhaust gas leakage at the sensor penetration point.
The 100208321 grommet replaces legacy part numbers including 100162926, MSC2196, and MSC2196K, making it the current standard for boiler flue sensor maintenance. Its precise dimensions allow for a friction-fit installation that stays secure under the thermal expansion and contraction cycles common in commercial heating applications. When executing a combustion analysis or sensor replacement, renewing this grommet is standard best practice to maintain the manifold's pressure integrity and prevent "nuisance" fault codes related to flue gas recirculation or sensor drift.
Key Benefits for the Contractor:
- OEM Compatibility: Exact fit for Lochinvar Knight (KH, KHN, WHB) and A.O. Smith high-efficiency systems ranging from 55,000 to 399,000 BTU.
- Thermal Resistance: Specifically formulated rubber to withstand the elevated temperatures of modern condensing boiler flue collectors.
- Leak Prevention: Creates a reliable seal around the flue sensor probe to prevent CO leaks and maintain intake air purity.
- Vibration Dampening: Minimizes mechanical stress on sensitive flue sensors during high-fire blower operation.
- Universal Utility: Cross-references with multiple legacy part numbers (MSC2196, 100162926) for broad fleet application.
Common Questions Regarding Part 100208321:
Which boiler models use the 100208321 flue sensor grommet?
This part is the standard flue sensor seal for Lochinvar KHB/KHN (55–285) and WHB (55–399) models, as well as several A.O. Smith and State commercial water heaters. Always check your specific unit's manual for the manifold assembly diagram.
Can I use a generic hardware store grommet instead of the 100208321?
No. Standard rubber grommets are not rated for the high-temperature flue gases or chemical exposure found in condensing boilers. Using a non-OEM part can lead to melting, air leaks, and potential system failure.
How often should this rubber grommet be replaced?
While durable, technicians should inspect the grommet during every annual maintenance call. If the rubber shows signs of becoming brittle, cracking, or losing its elasticity, it should be replaced immediately to ensure the safety of the flue assembly.
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.
Original: $10.81
-65%$10.81
$3.78Lochinvar & A.O. Smith 100208321 Rubber Grommet
For field technicians and mechanical contractors maintaining high-efficiency systems, the Lochinvar & A.O. Smith 100208321 Rubber Grommet is a critical OEM boiler part designed to ensure a secondary airtight seal for flue sensor assemblies. This high-temperature HVAC part is engineered specifically for Lochinvar Knight and A.O. Smith water heater units, including the widespread KH, KHN, and WHB fire tube boiler series. Constructed from a resilient EPDM-based rubber compound, this replacement water heater grommet provides essential vibration isolation and prevents hazardous exhaust gas leakage at the sensor penetration point.
The 100208321 grommet replaces legacy part numbers including 100162926, MSC2196, and MSC2196K, making it the current standard for boiler flue sensor maintenance. Its precise dimensions allow for a friction-fit installation that stays secure under the thermal expansion and contraction cycles common in commercial heating applications. When executing a combustion analysis or sensor replacement, renewing this grommet is standard best practice to maintain the manifold's pressure integrity and prevent "nuisance" fault codes related to flue gas recirculation or sensor drift.
Key Benefits for the Contractor:
- OEM Compatibility: Exact fit for Lochinvar Knight (KH, KHN, WHB) and A.O. Smith high-efficiency systems ranging from 55,000 to 399,000 BTU.
- Thermal Resistance: Specifically formulated rubber to withstand the elevated temperatures of modern condensing boiler flue collectors.
- Leak Prevention: Creates a reliable seal around the flue sensor probe to prevent CO leaks and maintain intake air purity.
- Vibration Dampening: Minimizes mechanical stress on sensitive flue sensors during high-fire blower operation.
- Universal Utility: Cross-references with multiple legacy part numbers (MSC2196, 100162926) for broad fleet application.
Common Questions Regarding Part 100208321:
Which boiler models use the 100208321 flue sensor grommet?
This part is the standard flue sensor seal for Lochinvar KHB/KHN (55–285) and WHB (55–399) models, as well as several A.O. Smith and State commercial water heaters. Always check your specific unit's manual for the manifold assembly diagram.
Can I use a generic hardware store grommet instead of the 100208321?
No. Standard rubber grommets are not rated for the high-temperature flue gases or chemical exposure found in condensing boilers. Using a non-OEM part can lead to melting, air leaks, and potential system failure.
How often should this rubber grommet be replaced?
While durable, technicians should inspect the grommet during every annual maintenance call. If the rubber shows signs of becoming brittle, cracking, or losing its elasticity, it should be replaced immediately to ensure the safety of the flue assembly.
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.
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Description
For field technicians and mechanical contractors maintaining high-efficiency systems, the Lochinvar & A.O. Smith 100208321 Rubber Grommet is a critical OEM boiler part designed to ensure a secondary airtight seal for flue sensor assemblies. This high-temperature HVAC part is engineered specifically for Lochinvar Knight and A.O. Smith water heater units, including the widespread KH, KHN, and WHB fire tube boiler series. Constructed from a resilient EPDM-based rubber compound, this replacement water heater grommet provides essential vibration isolation and prevents hazardous exhaust gas leakage at the sensor penetration point.
The 100208321 grommet replaces legacy part numbers including 100162926, MSC2196, and MSC2196K, making it the current standard for boiler flue sensor maintenance. Its precise dimensions allow for a friction-fit installation that stays secure under the thermal expansion and contraction cycles common in commercial heating applications. When executing a combustion analysis or sensor replacement, renewing this grommet is standard best practice to maintain the manifold's pressure integrity and prevent "nuisance" fault codes related to flue gas recirculation or sensor drift.
Key Benefits for the Contractor:
- OEM Compatibility: Exact fit for Lochinvar Knight (KH, KHN, WHB) and A.O. Smith high-efficiency systems ranging from 55,000 to 399,000 BTU.
- Thermal Resistance: Specifically formulated rubber to withstand the elevated temperatures of modern condensing boiler flue collectors.
- Leak Prevention: Creates a reliable seal around the flue sensor probe to prevent CO leaks and maintain intake air purity.
- Vibration Dampening: Minimizes mechanical stress on sensitive flue sensors during high-fire blower operation.
- Universal Utility: Cross-references with multiple legacy part numbers (MSC2196, 100162926) for broad fleet application.
Common Questions Regarding Part 100208321:
Which boiler models use the 100208321 flue sensor grommet?
This part is the standard flue sensor seal for Lochinvar KHB/KHN (55–285) and WHB (55–399) models, as well as several A.O. Smith and State commercial water heaters. Always check your specific unit's manual for the manifold assembly diagram.
Can I use a generic hardware store grommet instead of the 100208321?
No. Standard rubber grommets are not rated for the high-temperature flue gases or chemical exposure found in condensing boilers. Using a non-OEM part can lead to melting, air leaks, and potential system failure.
How often should this rubber grommet be replaced?
While durable, technicians should inspect the grommet during every annual maintenance call. If the rubber shows signs of becoming brittle, cracking, or losing its elasticity, it should be replaced immediately to ensure the safety of the flue assembly.
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.
