Grey Iron Pipe Union 4 Inch
Large 4-inch grey cast iron union for municipal water mains and drainage systems. Classified in HTS 7307.19.90.30 for other cast unions, providing robust, corrosion-resistant joints. Features mechanical joint ends for easy field assembly.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If flanged cast iron
Flanged fittings have separate provisions from unions in 7307.19.
If not predominantly cast
Mixed manufacturing processes may shift to other steel fittings.
If refractory cast iron version
High-temperature castings go to Chapter 69 for refractory materials.
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Import Tips & Compliance
• Heavy fittings require proper packing declarations to avoid damage claims
• Distinguish from flanged fittings by noting union nut design in photos/descriptions
• Comply with Buy America for US projects by documenting foreign origin separately
Related Products under HTS 7307.19.90.30
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A cast steel union fitting designed for connecting two pipes of 1-inch diameter, allowing easy disconnection without cutting the pipe. It falls under HTS 7307.19.90.30 as a cast iron or steel pipe fitting specifically classified as a union, not elbows or couplings. Used in plumbing and industrial piping systems for maintenance.
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Cast Steel Socket Weld Union 1/2 Inch
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Cast Iron Service Union 3/4 Inch
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Threaded Steel Union Adapter 1-1/2 Inch
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