Fulton Boiler 2-30-000118 Air Pressure Switch is a safety and control component designed to monitor air pressure levels within boiler and combustion systems. It works by detecting pressure changes between 0.17 and 5.0 inches water column and activating or interrupting electrical circuits when preset conditions are met. This switch is commonly used in Fulton boiler equipment and associ... https://www.partshnc.com/2-30-000118-fulton-boiler-airpresssw-17-5-0-wc