U.S. imports of parts for filtering or purifying machinery and apparatus (HS 842199) totaled $213.8M in August 2026, imported from 78 countries.
Importers of Parts for Filtering or Purifying Machinery and Apparatus paid $24.8M in duties in August 2026, an effective tariff rate of 11.58% of the $213.8M imported — duty actually collected as a share of that value, not the published tariff schedule.
Last updated: August 2026 dataReplacement and OEM parts for liquid and gas filtering or purifying machinery — covering everything from filter housings and media frames to control components — are consolidated under 8421.99, with the US schedule splitting entries between general filtering apparatus parts (8421990140) and a broader NESOI line (8421990180). Mexico and China are the leading US import sources, and goods from China may carry Section 301 tariff exposure depending on the specific part. Accurate classification requires linking the part to its parent machine, since parts for centrifuges (8421.91) are excluded and classified separately.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
12.7K shipments/mo
Both filter elements and housings are generally classifiable as parts of filtering or purifying machinery under 8421.99, provided they are identifiable as parts of a specific filtering apparatus. However, if a filter element is a consumable that could also be classified as a separate article in its own right (e.g., a woven filter fabric), the classification analysis should consider whether it has a more specific heading. A CBP binding ruling is advisable for high-volume consumable filter media.
No. Parts of centrifuges, including centrifugal dryers, are specifically classified under 8421.91 and are excluded from 8421.99. Importers shipping mixed consignments of centrifuge parts and filter-machine parts must declare them on separate tariff lines.
HSChapter 84
Subheading 3 of 12 in heading 8421
Subheading 842199 · $213.8M of $1.4B
ImportsExports
Imports
$213.8MYoY · free account
Exports
$187.6MYoY · free account
12-mo low · imports
YoY · free accountOver the twelve months to August 2026, the U.S. imported $2.3B of Parts for Filtering or Purifying Machinery and Apparatus.
Through August 2026. Source: U.S. Census Bureau.
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8421990180 | Parts of Mach & Apparat,Filt,Purify,Liq,Gas,NESOI | $151.1M | 10.94% | 70.79% | $16.5M |
| 8421990140 | Parts of Filtering or Purifying Apparatus | $62.7M | 13.12% | 74.11% | $8.2M |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8421990180 | Parts of Mach & Apparat,Filt,Purify,Liq,Gas,NESOI | $118.7M |
| 8421990140 | Parts of Filtering or Purifying Apparatus | $68.9M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Imports · August 2026
origin
China pays 33.5% duty; Mexico 0.7%.
customs district
destination
entry
rate provision · imports
26.2% enters free of duty; duty collected equals 11.58% of total import value.