Harmonized Tariff Schedule of the United States · HTS code · HS 8421.99
8421.99.01: Parts of filtering and purifying machinery: Centrifuges, including centrifugal dryers: parts, other
Parts of filtering and purifying machinery
Not declarable on its own: use one of its 2 subdivisions Data: Harmonized Tariff Schedule of the United States · checked on 24 October 2026
- 8421 Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof:
- Parts:
- 8421.99.01 Other
What you pay
Importing into USA
US additional duties of HTS chapter 99 in force on 22 October 2026 are included (Section 301, 232, 338 and 201). IEEPA duties are no longer collected after the Supreme Court ruling of February 2026. Conditional exemptions (US content, end use, metal share) are not computed: check the provision.
Additional duties and import rules
Charges on top of the customs duty, and rules the goods must meet at the border.
Additional duties and charges 1
- Additional dutySection 338 — Canada — discrimination against US alcoholic beverages, dairy, motor vehicles (Proclamations 11046–11048, as modified) 50%
- Applies to goods from
- Canada
- In force
- from 22 August 2026
- Legal act
- HTSUS 9903.03.14
Subdivisions
- 8421.99.01 Other Free
- 8421.99.01.40 Parts of machinery and apparatus for filtering or purifying water kg
- 8421.99.01.80 Other kg
Same subheading in other tariffs
8421.99 Centrifuges, including centrifugal dryers: parts, other
UK Free Third-country duty 4 tariff lines 
EU Free – 1.7% Third-country duty 2 tariff lines · average 0.9% 
Türkiye 1.7% Third-country duty 6 tariff lines 
Canada Free General (MFN) 2 tariff lines 
Mexico Free General (MFN) 2 tariff lines 
Brazil 7.2% – 12.6% General (MFN) 4 tariff lines · average 9.9% 
Argentina Free – 12.6% General (MFN) 7 tariff lines · average 9% 
Peru Free General (MFN) 2 tariff lines 
New Zealand Free – 5% General (MFN) 18 tariff lines · average 2.2% 
Japan Free General (MFN) 2 tariff lines 
Taiwan Free – 3% General (MFN) 3 tariff lines · average 2% 
GCC 5% General (MFN) 2 tariff lines 
Switzerland Free General (MFN) 1 tariff line 
Norway Free General (MFN) 1 tariff line 
North Macedonia Free General (MFN) 2 tariff lines 
Nigeria 5% General (MFN) 1 tariff line Binding rulings for similar goods
Decisions of U.S. Customs and Border Protection (CROSS) and HMRC (Advance Tariff Rulings) on goods classified here. A ruling binds only its holder, but shows how the authorities classify similar goods. The descriptions are the authorities’ own, in English.
- N359517 U.S. CBP
The tariff classification of components of Homestyle Aspen Oxygen Concentrator from China.
- N355019 U.S. CBP
The tariff classification of canisters from Mexico, China, and Great Britain
- N353710 U.S. CBP
The tariff classification of water filter components from the United Kingdom
- H342749 U.S. CBP
Application for Further Review of Protest No. 2801-24-102038; Application of Section 301 duties to filter membrane rolls and filter membrane flats from China; U.S. note 20(ttt)(i)(2), (28) to subchapter III of Chapter 99 (subheadings 9903.88.01, 9903.88.67, HTSUS).
- N340932 U.S. CBP
The tariff classification of a water softener tank from China
- N339973 U.S. CBP
The tariff classification of a lateral drain assembly from Canada
Legal notes
HTS code 8421.99.01 is a line of the Harmonized Tariff Schedule of the United States under HS subheading 8421.99 (centrifuges, including centrifugal dryers: parts, other).
The general duty is free.
2 statistical sub-lines below it are used in the declaration.
For the same subheading, the UK duty is free, the EU duty is 0%–1.7%, the Türkiye duty is 1.7%, the Canada duty is free, the Mexico duty is free, the Brazil duty is 7.2%–12.6%, the Argentina duty is 0%–12.6%, the Peru duty is free, the New Zealand duty is 0%–5%, the Japan duty is free, the Taiwan duty is 0%–3%, the GCC duty is 5%, the Switzerland duty is free, the Norway duty is free, the North Macedonia duty is free and the Nigeria duty is 5%.
The United States imported goods of subheading 8421.99 worth US$2bn in 2024; the largest supplier was China, and the United Kingdom ranked 8th with US$75m.
Questions and answers
What is the USA import duty for HTS code 8421.99.01?
The general duty in the Harmonized Tariff Schedule of the United States is free. Preferential rates for goods from agreement countries, anti-dumping duties and VAT are not included.
Where does the United States import these goods from?
For subheading 8421.99 as a whole, the largest supplier in 2024 was China (US$437m), followed by Mexico.