... Brass joint.Are common used for block valve; level glass; sylphon bellowss, one way valve, air manifold, liquid separators, and ... complicated parts. Mostly use for brazing electric check valve, Electronic expansion valve, and other cooling system parts.FB102C-3Similar products ... strength at joint gap.Use for Water hydrant, electric check valve, stop valve, and so on. FB102C-4Similar with FB102C-3, ...