When swapping this board

Corrosion Resistance: The cast brass construction and unique diaphragm seal prevent water from contacting the range spring

This is vital for systems with significant pressure drops across the distributor or coil

this valve maintains consistent flow control and system stability

Direct Fit OEM Specs: Machined with a 1 3/16" bore to match York shaft tolerances

Lochinvar & A.O. Smith 100293455 Pilot/Thermopile Freon When swapping this boardThe Lochinvar & A. O. Smith 100293455 Pilot Thermopile assembly is a critical OEM replacement part designed for precision ignition and consistent flame sensing in natural gas water heaters and boilers. This heavy duty pilot assembly features a high output 750 millivolt thermopile, providing the necessary DC voltage to hold the internal gas valve solenoid open during operation. Built to handle the high thermal stress of constant pilot flames, this kit