18 certified regulator body

Enhanced Security: Features locking cover screws that prevent unauthorized access to the thermostat's internal components

Key Benefits for HVAC Professionals Precise 0

Direct OEM Fit: Specifically designed to replace HK42FZ010 and HK42FZ015 series boards without harness modifications

For elevated system safety

Lochinvar & A.O. Smith 100278133 Pilot Assembly 318423-701 18 certified regulator bodyThe Lochinvar & A. O. Smith 100278133 Pilot Assembly is a critical combustion component for maintaining reliable ignition and flame sensing in high efficiency commercial and residential water heaters. As a factory authorized OEM heating part, the 100278133 ensures precise gas flow and millivolt output, securing the burner cycle against intermittent dropouts. This specific assembly serves as the updated, direct replacement for 100165902, featuring