U.S. exports of Filtering or Purifying Machinery and Apparatus for Liquids (NESOI) (HS 842129) totaled $259.2M in August 2026.
Importers of Filtering or Purifying Machinery and Apparatus for Liquids (NESOI) paid $14.9M in duties in August 2026, an average duty rate of 10.34% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Filtering or Purifying Machinery and Apparatus for Liquids (NESOI) imports of $144.1M in August 2026 ran 12% above the year-to-date monthly average of $128.6M.
Last updated: August 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.
9.0K import shipments a month
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.
Subheading 1 of 12 in heading 8421
Subheading 842129 · $259.2M of $1.0B
ImportsExports
Imports
$144.1MYoY · free account
Exports
$259.2MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $1.5B of Filtering or Purifying Machinery and Apparatus for Liquids (NESOI) and exported $3.2B.
Through August 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 | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8421290065 | Filter or Purify Mach & Apparatus for Liquid, NESOI | $124.5M | 9.97% | 73.28% | $12.4M |
| 8421290040 | Hydraulic Fluid Power Filters, Rated Gt/= 1000 Kpa | $8.9M | 15.57% | 92.24% | $1.4M |
| 8421290015 | Oil-Separation Equip Fr Filtering/Purifying Liquid | $5.8M | 9.60% | 59.98% | $552K |
| 8421290005 | Refrigerant Recovry/Recycl Fr Filter/Purify Liquid | $4.6M | 11.11% | 62.18% | $510K |
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.
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Exports · August 2026
destination
customs district
origin
entry
rate provision · imports
24.7% enters free of duty; duty collected equals 10.34% of imports for consumption.