For millivolt DC applications

High Voltage Duty: 440VAC rating handles voltage spikes more effectively than standard 370V units

making it an ideal drop-in replacement for standard wall switches

Ensuring reliable switching in industrial and commercial HVAC systems

Lochinvar & A.O. Smith 100112658 Pressure Switch 321894-709 For millivolt DC applicationsThe Lochinvar & A. O. Smith 100112658 Pressure Switch is a critical safety and operational component designed for high efficiency water heaters and boiler systems. Specifically calibrated at a 0. 27" WC (Water Column) set point, this diaphragm style switch ensures the vent blower or inducer motor is moving sufficient air to support safe combustion. As a genuine Honeywell IS20451 6168 OEM part, it delivers the precise switching required to prevent