and 325-7 Series line pressure regulators

utilizing the Trane furnace limit switch ensures the system stays within manufacturer specifications

The high-pressure function features a fixed 70 PSI differential

including the TVS-811 and EM variations

leak-free transition

Lochinvar & A.O. Smith 100173793 Arm Assembly 324846-701 and 325-7 Series line pressureThe Lochinvar & A. O. Smith 100173793 Arm Assembly is a critical OEM replacement part engineered for high efficiency commercial boilers and heating systems. As a veteran grade gas air arm assembly, this component ensures the precise mechanical alignment necessary for optimal combustion and fluid regulation. Specifically designed for compatibility with Lochinvar Knight series models (including KBN, AWN, and SNA 500), this assembly facilitates the