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HSChapter 84
U.S. exports of filtering or purifying machinery and apparatus for liquids (nesoi) (HS 842129) totaled $260.4M in July 2026.
Importers of Filtering or Purifying Machinery and Apparatus for Liquids (NESOI) paid $14.1M in duties in July 2026 — an effective duty rate of 15% on $92.2M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataA broad residual heading, 8421.29 captures liquid-filtering and purifying equipment not covered by the more specific beverage or engine-filter subheadings — including hydraulic fluid power filters rated at or above 1,000 kPa (8421290040), oil-separation equipment (8421290015), and refrigerant recovery and recycling apparatus (8421290005). Mexico and Germany lead US imports, reflecting both North American industrial supply chains and German engineering exports in hydraulic and process-filtration systems. The heading's catch-all nature means classification disputes are common; importers should document the fluid medium, operating pressure, and intended industrial application.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
9.1K shipments/mo
Under the US schedule, hydraulic fluid power filters rated at or above 1,000 kPa are classified at 8421290040, while lower-rated or general liquid-filtering apparatus not otherwise specified falls under 8421290065. Pressure ratings from the manufacturer's technical datasheet are the controlling specification.
If the system is not dedicated to beverage processing and does not qualify as a water-purification apparatus under a more specific heading, it would generally fall under 8421.29 as filtering or purifying machinery for liquids NESOI. The primary function and the nature of the liquid being processed are the key classification factors; a CBP binding ruling can provide certainty for high-value or recurring shipments.
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Subheading 6 of 12 in heading 8421
Subheading 842129 · $123.3M of $1.3B
ImportsExports
Imports
$123.3MYoY · Pro
Exports
$260.4MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
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 |
|---|---|---|---|---|---|
| 8421290065 | Filter or Purify Mach & Apparatus for Liquid,NESOI | $106.9M | 11.16% | 74.18% | $11.9M |
| 8421290040 | Hydraulic Fluid Power Filters,Rated Gt/= 1000 Kpa | $8.4M | 14.37% | 91.13% | $1.2M |
| 8421290005 | Refrigerant Recovry/Recycl Fr Filter/Purify Liquid | $5.8M | 11.30% | 63.17% | $656K |
| 8421290015 | Oil-Separation Equip Fr Filtering/Purifying Liquid | $2.2M | 15.09% | 73.72% | $331K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
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.
Exports · July 2026
destination
customs district
origin
entry
rate provision · imports
22.7% enters free of duty; the effective duty rate is 11.46%.