Flue Exhaust Pipe Assembly for Instantaneous Gas Heaters from Japan
Stainless steel concentric flue pipe set venting combustion exhaust while drawing intake air in tankless water heaters. HTS 8419.90.10.00 applies as essential safety part for non-electric instantaneous heaters. Design prevents carbon monoxide buildup during on-demand operation.
Duty Rate — Japan → United States
25%
Rate breakdown
9903.82.0925%Except as provided for in headings 9903.82.16, 9903.82.20–9903.82.26 and 9903.85.68, articles of copper and derivative aluminum and steel articles, as provided for in subdivisions (c)(vi)–(viii) and (xi) 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
• Include UL or equivalent certification for venting safety to support tariff heading
• Document concentric design specs distinguishing from standard chimney pipes