The Maxitrol 325-5-1/2 Gas Pressure Regulator is a modulating control device designed to maintain stable gas pressure in HVAC heating systems. It operates by sensing downstream pressure and adjusting an internal valve to regulate gas flow, ensuring consistent burner supply. Commonly used in gas furnaces, unit heaters, and commercial heating equipment, this regulator supports safe and ... https://www.partshnc.com/maxitrol-325-5-1-2-gas-pressure-regulator