The A.J. Antunes 8104116203 Low Gas Pressure Switch is specifically designed to safe guard the gas-fired appliances such as fryers, ovens etc from operating at very low gas pressure in HVAC systems. This switch controls the pressure of gas within an appliance with the advantage of using break if the pressure falls to mild level. It has a 1/20” WC setting and 1/4” NPT port. The switch ... https://www.partshnc.com/8104116203-aj-antunes-wc-open-lo-auto-reset