The Itron-Actaris B42R-3/4 Gas Regulator is a dependable pressure control device designed for residential and light commercial gas furnaces, boilers, and water heaters. Equipped with a 3/4-inch connection and an internal relief valve, it maintains stable outlet pressure for safe and efficient burner operation. https://www.partshnc.com/b42r-34-itron-actaris-gas-regulator-internal-relief-valve