Lochinvar & A.O. Smith 100111921 Relief Valve
The Lochinvar and A.O. Smith 100111921 Relief Valve is a critical safety component designed for high-efficiency commercial boilers and water heaters. Engineered to meet strict ASME Section IV requirements, this pressure relief valve protects the heat exchanger and plumbing system from over-pressurization by opening at its specific factory-set PSI. This genuine OEM replacement part replaces older part numbers including 100111921 and RLVAL2409, ensuring exact fitment and reliable reset performance. In the field, technicians prioritize this valve for its corrosion-resistant brass body and precise spring tension, which prevents nuisance weeping while maintaining a crisp opening threshold. Integrating this boiler safety valve into your maintenance routine ensures the system operates within safe mechanical limits, preventing catastrophic failures in high-BTU applications. It is compatible with a wide range of Lochinvar Knight and A.O. Smith Cyclone models, making it an essential stock item for commercial hydronic service calls.
Key Benefits for Technicians- Factory-Calibrated Precision: Built to ASME standards to ensure reliable opening and closing cycles under high-demand commercial loads.
- OEM Compatibility: Guaranteed fit for Lochinvar and A.O. Smith units, reducing installation time and eliminating the risks associated with universal parts.
- High-Grade Construction: Features a robust brass body and heavy-duty internal components to resist scale buildup and thermal fatigue.
- System Protection: Designed to provide rapid pressure discharge to protect the heat exchanger and secondary piping from structural damage.
When should this relief valve be replaced?
If the valve is leaking/weeping or fails to reseat properly after a manual lift test or a high-pressure event, an immediate replacement is required to maintain system safety.
Is this valve compatible with potable water systems?
Yes, this component is designed for use in both commercial water heaters and hydronic heating boilers, provided the system pressure rating matches the valve specification.
What causes frequent tripping of the 100111921 valve?
Common causes include a waterlogged expansion tank, a failed pressure reducing valve, or a malfunctioning t-stat/aquastat causing the system to overheat.
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: $170.91
-65%$170.91
$59.82Lochinvar & A.O. Smith 100111921 Relief Valve
The Lochinvar and A.O. Smith 100111921 Relief Valve is a critical safety component designed for high-efficiency commercial boilers and water heaters. Engineered to meet strict ASME Section IV requirements, this pressure relief valve protects the heat exchanger and plumbing system from over-pressurization by opening at its specific factory-set PSI. This genuine OEM replacement part replaces older part numbers including 100111921 and RLVAL2409, ensuring exact fitment and reliable reset performance. In the field, technicians prioritize this valve for its corrosion-resistant brass body and precise spring tension, which prevents nuisance weeping while maintaining a crisp opening threshold. Integrating this boiler safety valve into your maintenance routine ensures the system operates within safe mechanical limits, preventing catastrophic failures in high-BTU applications. It is compatible with a wide range of Lochinvar Knight and A.O. Smith Cyclone models, making it an essential stock item for commercial hydronic service calls.
Key Benefits for Technicians- Factory-Calibrated Precision: Built to ASME standards to ensure reliable opening and closing cycles under high-demand commercial loads.
- OEM Compatibility: Guaranteed fit for Lochinvar and A.O. Smith units, reducing installation time and eliminating the risks associated with universal parts.
- High-Grade Construction: Features a robust brass body and heavy-duty internal components to resist scale buildup and thermal fatigue.
- System Protection: Designed to provide rapid pressure discharge to protect the heat exchanger and secondary piping from structural damage.
When should this relief valve be replaced?
If the valve is leaking/weeping or fails to reseat properly after a manual lift test or a high-pressure event, an immediate replacement is required to maintain system safety.
Is this valve compatible with potable water systems?
Yes, this component is designed for use in both commercial water heaters and hydronic heating boilers, provided the system pressure rating matches the valve specification.
What causes frequent tripping of the 100111921 valve?
Common causes include a waterlogged expansion tank, a failed pressure reducing valve, or a malfunctioning t-stat/aquastat causing the system to overheat.
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
The Lochinvar and A.O. Smith 100111921 Relief Valve is a critical safety component designed for high-efficiency commercial boilers and water heaters. Engineered to meet strict ASME Section IV requirements, this pressure relief valve protects the heat exchanger and plumbing system from over-pressurization by opening at its specific factory-set PSI. This genuine OEM replacement part replaces older part numbers including 100111921 and RLVAL2409, ensuring exact fitment and reliable reset performance. In the field, technicians prioritize this valve for its corrosion-resistant brass body and precise spring tension, which prevents nuisance weeping while maintaining a crisp opening threshold. Integrating this boiler safety valve into your maintenance routine ensures the system operates within safe mechanical limits, preventing catastrophic failures in high-BTU applications. It is compatible with a wide range of Lochinvar Knight and A.O. Smith Cyclone models, making it an essential stock item for commercial hydronic service calls.
Key Benefits for Technicians- Factory-Calibrated Precision: Built to ASME standards to ensure reliable opening and closing cycles under high-demand commercial loads.
- OEM Compatibility: Guaranteed fit for Lochinvar and A.O. Smith units, reducing installation time and eliminating the risks associated with universal parts.
- High-Grade Construction: Features a robust brass body and heavy-duty internal components to resist scale buildup and thermal fatigue.
- System Protection: Designed to provide rapid pressure discharge to protect the heat exchanger and secondary piping from structural damage.
When should this relief valve be replaced?
If the valve is leaking/weeping or fails to reseat properly after a manual lift test or a high-pressure event, an immediate replacement is required to maintain system safety.
Is this valve compatible with potable water systems?
Yes, this component is designed for use in both commercial water heaters and hydronic heating boilers, provided the system pressure rating matches the valve specification.
What causes frequent tripping of the 100111921 valve?
Common causes include a waterlogged expansion tank, a failed pressure reducing valve, or a malfunctioning t-stat/aquastat causing the system to overheat.
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.
