United States tariff line 8421.21.00.00: For filtering or purifying water
Last updated
Key facts
- Tariff line
- 8421.21.00.00
- Covers
- Filtering or purifying machinery and apparatus for liquids, for filtering or purifying water
- Duty (MFN)
- Free
- Additional duties
- None recorded
- Restrictions
- None recorded
- Tariff
- United States
- HS subheading
- 8421.21
Summary
In the United States tariff, line 8421.21.00.00 covers filtering or purifying machinery and apparatus for liquids, for filtering or purifying water. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 8421.21 in heading 84.21 (chapter 84).
What this line covers
In the United States tariff, line 8421.21.00.00 covers filtering or purifying machinery and apparatus for liquids, for filtering or purifying water.
Its legal text is “For filtering or purifying water”, read under “Filtering or purifying machinery and apparatus for liquids”.
How it is structured
It falls under HS subheading 8421.21 in heading 84.21 (chapter 84). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.
- Chapter 84
- Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof
- Heading 84.21
- Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof
- Subheading 8421.21
- Filtering or purifying machinery and apparatus for liquids
- Line 8421.21.00.00
- For filtering or purifying water
Duty
Goods under this line enter free of general (MFN) duty.
In other countries
No other national tariff on border.bot has live lines under 8421.21 yet.
Frequently asked questions
What does tariff line 8421.21.00.00 cover in the United States tariff?
In the United States tariff, line 8421.21.00.00 covers filtering or purifying machinery and apparatus for liquids, for filtering or purifying water.
What is the general (MFN) duty on 8421.21.00.00 in the United States?
Goods under this line enter free of general (MFN) duty.
Sources and updates
The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
This page was last updated on 9 October 2026.
Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.
Official source files: