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
15.6%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
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