For fail-safe operation

Open High" device

The Sporlan 401035 C-165-S Catch-All Filter Drier is a 16-cubic-inch molded core unit engineered to protect critical system components from moisture

while the mechanical spring return mechanism guarantees a defined fail-safe position during power loss

Lochinvar & A.O. Smith 100074451 PCB 324846-701 For fail-safe operationThe Lochinvar & A. O. Smith 100074451 PCB is a critical integrated control module designed for high efficiency commercial and residential water heaters and boilers. Known as the MC50 PCB, this genuine OEM component manages vital system operations including ignition sequences, temperature regulation, and safety circuit monitoring. Engineered for a precise fit in Lochinvar Knight and various A. O. Smith tankless models, it ensures absolute signal