The Itron-Actaris B42R-1 Gas Regulator is a compact, high-performance pressure regulator designed to deliver stable gas flow for residential and light commercial heating equipment, including gas furnaces, boilers, and water heaters. Featuring 1/2" x 9/16" connections and an integrated relief valve, it maintains consistent outlet pressure within the 6–16" WC range. https://www.partshnc.com/b42r-1-itron-actaris-1-irv12x916-orif6-16-drkgr