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ANVIL® International offers the broadest line of malleable iron fitting sizes in galvanized finish. Every fitting is manufactured and tested to meet ANVIL® strict quality standards. All ANVIL® class 150 malleable iron fittings conform to ASME B16.3 and unions conform to ASME B16.39. All elbows and tees 3/8 in (10 DN) and larger are 100% gas tested at a minimum of 100 psi.