The Hubbell Industrial Controls 69WA4 Pressure Switch is a dependable and adaptable device for maintaining constant air or water pressure in a variety of HVAC systems. It detects changes in pressure by using an internal diaphragm and pressure settings that may be adjusted. For an efficient and reliable HVAC system, the Hubbell Industrial Controls Pressureswitch is a great choice fo... https://www.partshnc.com/69wa4-hubbell-industrial-controls-pressureswitch-airwtr-30-50