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HTS code reference›Chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances›8421.21.00.00
US HTS · 2026 REVISION 12

HTS Code 8421.21.00.00

For filtering or purifying water

Official tariff path

Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: › Filtering or purifying machinery and apparatus for liquids: › For filtering or purifying water

Level: statistical10General duty: FreeUnit: No.
WHAT THIS PAGE ADDSRead the code in context

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Does HTS 8421.21.00.00 fit your product?

This is the fastest way to use the page: compare the exact commercial description with the legal wording, then check the closest child or sibling provision. A valid code is not automatically the right code for every product in the same category.

  • The product must match the tariff wording: For filtering or purifying water.
  • This page is a reporting provision; verify the complete product description and chapter notes before filing.
  • The displayed duty is Free; origin programs, trade remedies, quotas and taxes may change the final amount.

What does HTS 8421.21.00.00 cover?

This provision appears in the 2026 Harmonized Tariff Schedule of the United States under the following legal tariff hierarchy.

  1. 1Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof:
  2. 2Filtering or purifying machinery and apparatus for liquids:
  3. 3For filtering or purifying water

Nearby tariff provisions

These are the alternatives worth comparing when one product fact changes.

8421.11.00.00Cream separators8421.12.00.00Clothes-dryers8421.19.00.00Other8421.22.00.00For filtering or purifying beverages other than water8421.23.00.00Oil or fuel filters for internal combustion engines8421.29.00Other8421.31.00.00Intake air filters for internal combustion engines8421.32.00.00Catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines
Official source and limitations

Based on USITC HTS 2026 Revision 12, published July 21, 2026. The general rate does not include every origin-specific program, Section 301 or 232 measure, antidumping or countervailing duty, quota, or other agency requirement.

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