The Maxitrol 325-7A-1 1/4-12A49 Regulator is a precision gas pressure control device that maintains consistent fuel pressure for safe and efficient combustion in HVAC systems. It automatically adjusts downstream gas flow to match demand, ensuring stable burner performance. Used in residential and commercial furnaces, boilers, and water heaters, it enhances system reliability and fuel ... https://www.partshnc.com/325-7a-1-1-4-12a49-maxitrol-regulator-1-4-5-psi-maximum-inlet-pressure-4-12-water-column-w-limiter