What is the U.S. tariff rate on filtering and separation equipment?

USITC calculated duties imply an effective rate of 8.99% in Jun 2026 (calculated duties ÷ covered customs value, USITC DataWeb). The parseable Column 1 General line-rate range is 0%–2.5%; individual lines are called “Free” only when the official General field is literally Free, and product, origin, preference and tariff mix can contribute to the observed-rate difference.

What are the statutory MFN line rates for filtering and separation equipment?

The parseable Column 1 General line-rate range is 0%–2.5% across the family's 14 eight-digit HTS lines in the 2026 Harmonized Tariff Schedule (headings 8421). “Free” means the official General field is literally Free for a line; it does not determine final entry liability.

Which countries supply the most filtering and separation equipment to the U.S.?

Top retained sources in 2025: Mexico ($4.2B at 2.74%), Canada ($1.5B at 1.16%), Germany ($1.5B at 8.93%). Mexico holds 30% of total family import customs value. Retained sources cover 78.2%; their HHI is 1270, a lower bound whose floor falls in the diversified range without classifying the omitted tail.

How much filtering and separation equipment does the U.S. import?

$14.0B of customs value in 2025, with $1.3B in USITC Calculated Duties — an effective calculated-duty rate of 9.58%.

Is the U.S. a net importer of filtering and separation equipment?

Yes — a net importer in 2025: $14.0B imported vs $10.6B exported (exports are 76% of imports).

Tariff monitor · Machinery & Equipment

Filtering and Separation Equipment: Statutory & Effective Tariff Rates

USITC Column 1 General rates for 14 filtering and separation equipment HTS lines (parseable range 0%–2.5%). Effective rate Jun 2026: 8.99%; monthly history since 202

The short answer

The observed effective calculated-duty rate on U.S. imports of filtering and separation equipment was 8.99% in Jun 2026, down from 10.36% a year earlier — USITC Calculated Duties divided by covered customs value. The Column 1 General line-rate range is 0%–2.5% across 14 HTS lines in the 2026 schedule; individual lines are called “Free” only when the official General field is literally Free, which still does not determine a shipment’s final duty. Mexico is the largest source, holding 30% of 2025 imports.

Statutory rates from the schedule

Centrifuges, filters, and purifiers for liquids and gases — clarifying coolant, air, oil, and process streams. This family covers HTS heading 8421: 14 eight-digit rate lines with a parseable Column 1 General range of 0%–2.5% in the 2026 schedule. “Free” means the official General field is literally Free for that line; it does not determine final entry liability.
Chapter 99 references on individual lines (for example, 9903.90.08) identify provisions to review; applicability and any additional duty depend on the entry facts.

Observed calculated-duty data

Latest month on record (2026-06): 8.99% effective on $1.3B of imports, versus 10.36% in the same month a year earlier. The monthly archive holds 42 observations from 2023-01 through 2026-06.
In 2025, U.S. imports for consumption in this family totaled $14.0B in customs value, with $1.3B in USITC reported calculated duty on $14.0B of covered customs value: an effective calculated-duty rate of 9.58%. The aggregate reflects the recorded entry mix but does not attribute the result to a specific legal provision.
A year earlier the effective calculated-duty rate was 2.25%, so the observed rate rose 7.3 points.
Top source countries in 2025: Mexico ($4.2B at 2.74%), Canada ($1.5B at 1.16%), Germany ($1.5B at 8.93%), China ($1.3B at 42.84%), South Korea ($601.1M at 7.92%).
Reported freight and insurance equaled 3.54% of covered customs value in 2025 ($387.7M total); charge coverage was 78.2% of customs value, from USITC DataWeb. It is shown alongside the effective calculated-duty rate and is not part of the customs-value duty base.

Representative rate lines

8421.11.00.00: Cream separators · MFN Free
8421.12.00.00: Clothes-dryers · MFN Free
8421.19.00.00: Other · MFN 1.3%
8421.21.00.00: For filtering or purifying water · MFN Free
8421.22.00.00: For filtering or purifying beverages other than water · MFN Free
8421.23.00.00: Oil or fuel filters for internal combustion engines · MFN 2.5%
8421.29.00: Other · MFN Free
8421.31.00.00: Intake air filters for internal combustion engines · MFN 2.5%

Frequently asked questions

What is the U.S. tariff rate on filtering and separation equipment? USITC calculated duties imply an effective rate of 8.99% in Jun 2026 (calculated duties ÷ covered customs value, USITC DataWeb). The parseable Column 1 General line-rate range is 0%–2.5%; individual lines are called “Free” only when the official General field is literally Free, and product, origin, preference and tariff mix can contribute to the observed-rate difference.
What are the statutory MFN line rates for filtering and separation equipment? The parseable Column 1 General line-rate range is 0%–2.5% across the family's 14 eight-digit HTS lines in the 2026 Harmonized Tariff Schedule (headings 8421). “Free” means the official General field is literally Free for a line; it does not determine final entry liability.
Which countries supply the most filtering and separation equipment to the U.S.? Top retained sources in 2025: Mexico ($4.2B at 2.74%), Canada ($1.5B at 1.16%), Germany ($1.5B at 8.93%). Mexico holds 30% of total family import customs value. Retained sources cover 78.2%; their HHI is 1270, a lower bound whose floor falls in the diversified range without classifying the omitted tail.
How much filtering and separation equipment does the U.S. import? $14.0B of customs value in 2025, with $1.3B in USITC Calculated Duties — an effective calculated-duty rate of 9.58%.
Is the U.S. a net importer of filtering and separation equipment? Yes — a net importer in 2025: $14.0B imported vs $10.6B exported (exports are 76% of imports).

About this data

Reference statistics derived from USITC published data. Not a customs ruling. MFN-Free and Special-rate fields describe statutory line coverage only; final entry liability requires origin, date, eligibility, exclusions and other transaction facts. Calculated Duties are statistical estimates, not a cash-collections ledger. Confirm classification, origin, program eligibility, and final entry liability with a licensed customs broker.

Last reviewed 2026-08-31.