Analysis
HTS 8421.21.00 covers for filtering or purifying water under heading 8421 (centrifuges, including centrifugal dryers; filtering or purifying machinery and…).
Neighbouring lines carry rates from duty-free to 2.5%, so the exact line matters. The widest gap is with 8421.31.00 (intake air filters for internal combustion engines), at 2.5%: a product that belongs there but is entered here, or the reverse, changes the duty by 2.5 percentage points.
Goods from countries without normal trade relations pay the column 2 rate of 35% instead of nothing, so origin decides between free entry and a 35% duty.
Goods classified here enter the United States duty-free at the general (normal trade relations) rate, as do about 61% of the 823 tariff lines in chapter 84. Chapter 99 measures such as Section 301 or 232 can still apply on top, depending on where the goods come from.
Census statistics map these goods to NAICS 33399 (All Other General Purpose Machinery Manufacturing), an industry of 3,460 US establishments employing 158,898 people. That is the industry code a US manufacturer of the same product would normally use.
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 8421.11.00 | Centrifuges, including centrifugal dryers: cream separators | Free |
| 8421.12.00 | Centrifuges, including centrifugal dryers: clothes-dryers | Free |
| 8421.19.00 | Centrifuges, including centrifugal dryers: other | 1.3% |
| 8421.22.00 | For filtering or purifying beverages other than water | Free |
| 8421.23.00 | Oil or fuel filters for internal combustion engines | 2.5% |
| 8421.29.00 | Filtering or purifying machinery and apparatus for liquids: other | Free |
| 8421.31.00 | Intake air filters for internal combustion engines | 2.5% |
| 8421.32.00 | Catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines | Free |
| 8421.39.01 | Filtering or purifying machinery and apparatus for gases: other | Free |
| 8421.91.20 | Drying chambers for the clothes-dryers of subheading 8421.12 and other parts of clothes-dryers incorporating drying chambers | Free |
| 8421.91.40 | Furniture designed to receive the clothes-dryers of subheading 8421.12 | Free |
| 8421.91.60 | Of centrifuges, including centrifugal dryers: other | Free |
| 8421.99.01 | Parts: other | Free |