Rheem-Ruud 42-105601-25K SPST Pressure Switch WC - 0.35

The Rheem-Ruud 42-105601-25K is a single pole single throw (SPST) pressure switch designed for HVAC applications. This pressure switch is calibrated to activate at -0.35 inches water column (WC), making it ideal for monitoring negative pressure in furnace draft systems.

Key Features:

• SPST (Single Pole Single Throw) switching configuration for simple on/off control
• Pressure activation point of -0.35" WC for reliable draft sensing
• Direct OEM replacement part for Rheem and Ruud heating equipment
• Ensures proper venting and safe furnace operation
• Quality construction for reliable performance in demanding HVAC environments

This pressure switch is a critical safety component that verifies adequate draft pressure before allowing the furnace to operate. It helps prevent unsafe combustion conditions by ensuring proper venting of exhaust gases. Compatible with various Rheem and Ruud furnace models as a genuine OEM replacement part.