Standard/Approvals: ASTM A197 (Casting), ASTM A153 (Hot-Dipped Galanizing), ASME B16.3 (Dimensions), ASME B1.20.1 (Threads), ASME B16.14 (Bushing), ASTM A153 (Hot-Dipped Galanizing), cULus Listed, FM Approved, Manufacturing Facility is ISO 9001:2008 and ISO 14001, NSF/ANSI 61-4 and CA AB1953, UL Listed