Grooved Ductile Iron Reducing Coupling 4x3-inch from Mexico
A reducing coupling in ductile iron connecting 4-inch to 3-inch grooved pipes, used in plumbing and irrigation systems. Classified under HTS 7307.19.30.40 for its cast ductile construction and grooved ends. Provides transitional sizing with high-pressure tolerance.
Duty Rate — Mexico → United States
55.6%
Rate breakdown
9903.82.0250%Except as provided for in headings 9903.82.14, 9903.85.67 and 9903.85.68, articles of aluminum, of steel or of copper and derivative aluminum or steel articles, as provided for in subdivisions (c)(i)–(v) of U.S. note 16 to this subchapter
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Declare exact size reduction (e.g
• 4x3 NPS) on commercial invoice to prevent sizing disputes
• Provide hydrostatic test certifications; importers often overlook ductile iron's ASTM A536 Grade 65-45-12 requirement
• Label for potable water compliance (NSF-61) if applicable to avoid reclassification issues