Kit Completeness: The 100109954 pressure switch kit includes the necessary components for a direct swap-out during a service call

reducing manual service calls

this specific model is a direct acting unit configured for low limit applications

while the built-in thermal expansion bypass provides critical protection against pressure spikes caused by water heating

Flexible Routing: The combination of a straight and 90-degree fitting allows for tight-radius bends and clean cable management in crowded mechanical casings

Lochinvar & A.O. Smith 100109522 Switch 322838-753 Kit Completeness: The 100109954 pressureThe Lochinvar & A. O. Smith 100109522 Pressure Switch is a critical safety component designed for precise pressure monitoring in high efficiency boilers, furnaces, and water heaters. This SPDT pressure switch (Single Pole Double Throw) features a fixed set point, typically calibrated to 0. 95 WC, ensuring that the combustion blower is moving sufficient air before the ignition sequence initiates. As a genuine OEM replacement part, the 100109522 is