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Advanced Diagnostics: Multi-color LED provides clear communication of system status and lockout codes
Always verify the part number against the unit's rating plate or service manual before installation
providing critical overheat protection for heat exchangers and downstream components
Precise pressure regulation is set at a factory-standard 3
Common Questions: How do I confirm the Fasco A307 is the correct replacement
Lochinvar & A.O. Smith 100167442 Relief Valve 340155-7026 Advanced Diagnostics: Multi-color LED providesThe Lochinvar & A. O. Smith 100167442 Relief Valve is a critical safety component designed for high efficiency hydronic systems. This 30 PSI relief valve is engineered to protect the heat exchanger from over pressure conditions by providing a precise discharge point. As a genuine OEM replacement part, it ensures total compatibility with the Lochinvar Knight WB series and various A. O. Smith water boilers. The 100167442 model features a 3 4 inch