Lochinvar & A.O. Smith 100208384 Pressure Switch 0.85" WC

The Lochinvar & A.O. Smith 100208384 Pressure Switch is a mechanical control tool that is used to check the air or gas pressure in the heating and hot water systems. Adjusted to operate at 0.85 inches of water column, it opens or closes an electrical circuit when the system pressure is at its set point. This switch is placed in furnaces, boilers, or combustion air assemblies to ensure that the airflow or draft is correct before it can be ignited or any other process can be carried out.