Lochinvar & A.O. Smith 100110738 Relief Valve

The Lochinvar & A.O. Smith 100110738 is a heavy-duty Temperature and Pressure (T&P) relief valve engineered for commercial and residential water heating systems. As an essential safety component, this 3/4 inch male inlet valve is factory-set to a 150 PSI relief pressure and a 210°F temperature limit, ensuring critical protection against tank over-pressurization and thermal expansion. Designed with a 1 inch cavitation outlet, it provides high-capacity discharge, rated at approximately 1,912,000 BTU/hr to handle demanding hydronic loads. This OEM water heater part is a direct replacement for various Lochinvar and A.O. Smith models, maintaining system integrity and compliance with rigorous safety standards. For technicians performing HVAC system maintenance, utilizing this genuine Lochinvar relief valve ensures exact fitment and reliable mechanical actuation, preventing the catastrophic failure of pressurized vessels. Its corrosion-resistant internal components and durable construction make it the preferred choice for professional relief valve replacement in high-recovery heating applications.

Key Benefits

• High BTU Capacity: Rated for up to 1,912,000 BTU/hr, making it suitable for large-scale commercial water heaters.
• Precision Safety Settings: Features a factory-calibrated 150 PSI and 210°F trip point for consistent activation.
• Optimal Discharge Flow: The 1-inch outlet helps mitigate cavitation and ensures rapid pressure reduction during discharge.
• Professional Grade Durability: Constructed with robust materials to withstand the high-temperature environments of industrial boiler rooms.
• Universal Compatibility: Serves as an authentic OEM swap for common Lochinvar and A.O. Smith inventory.

Common Questions

• How do I confirm if this valve fits my specific Lochinvar model? You should verify the part number against your unit's data plate or technical manual; this valve is designed specifically for 3/4" NPT configurations.
• What is the primary cause of a relief valve dripping or leaking? Constant dripping often indicates thermal expansion issues or debris lodged in the valve seat, signaling it is time for a professional inspection or replacement.
• Can this be used on systems other than water heaters? While primarily used for water heaters, it is compatible with various HVACR pressurized vessels requiring a 150 PSI/210°F safety limit.

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.