Lochinvar & A.O. Smith 100108826 Pressure Switch 322027-701 This switch is calibrated to

This switch is calibrated to open the electrical circuit at 420 PSI (Cut-Out) and automatically close/reset when pressure drops to 300 PSI (Cut-In)

this 1/2" NPT-compatible glass offers the precision required for accurate steam boiler troubleshooting and long-term HVAC system efficiency

Common Questions Is this switch field-adjustable

Broad Application Range: Specifically designed for Lochinvar boiler parts and A

Lochinvar & A.O. Smith 100108826 Pressure Switch 322027-701 This switch is calibrated toThe Lochinvar & A. O. Smith 100108826 Pressure Switch is a critical safety component designed for precise draft monitoring in high efficiency commercial water heaters and boilers. This SPDT (Single Pole Double Throw) pressure switch serves as a reliable interface for the control board, verifying that the inducer blower is pulling the correct static pressure before allowing the ignition sequence to proceed. Engineered as a genuine OEM replacement part,