What is HS code 8421.21?

HS code 8421.21 covers: For filtering or purifying water. It belongs to chapter 84 (Machinery and mechanical appliances; computers) of the Harmonized System.

What is the US import duty for HS code 8421.21?

The US general (normal trade relations) rate is: Free. Preference programs and Section 232/301 surcharges can change the effective rate; see the HTS lines for detail.

What is the UK commodity code for 8421.21?

The UK extends 8421.21 to 3 declarable 10-digit commodity codes, starting with 8421210000. The full code goes on the UK customs declaration.

Chapter 84 · Machinery and mechanical appliances; computers · Section 16

HS Code 8421.21

For filtering or purifying water

Heading 8421: Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof

US duty (general)

Free

US HTS lines

EU CN codes

UK commodity codes

Unit

No.

US HTS + UK Tariff v4.0.1596 · updated 2026-09-10 · sources

United States - HTS lines under 8421.21

Source: official Harmonized Tariff Schedule (USITC). "General" is the normal-trade-relations rate; "Special" lists preference programs; "Other" is the column-2 rate. Additional Section 232/301 duties may apply on top.

HTS code	Description	General	Special	Other	Unit
8421.21.00	For filtering or purifying water	Free	-	35%	No.

Estimate the US duty runs in your browser · no caps

Enter the customs value (and quantity, when a rate is per-unit) to estimate the general-rate duty per HTS line. Estimates exclude Section 232/301 surcharges, MPF/HMF and fees. Not a customs ruling.

Customs value (USD) Quantity (No.)

European Union - CN codes under 8421.21

Source: EU Combined Nomenclature (Eurostat, © European Union, reused per Decision 2011/833/EU). Duty rates and measures live in TARIC; each code links to the official consultation.

CN code	Description
8421 21 00	For filtering or purifying water	EU duty (TARIC) →

United Kingdom - commodity codes under 8421.21

Source: UK Integrated Online Tariff (Open Government Licence v3.0). Declarable 10-digit codes go on the customs declaration; check the official page for the current duty and VAT measures.

Commodity code	Description
8421 21 00 00	For filtering or purifying water	UK duty & VAT →
8421 21 00 10	For use in civil aircraft	UK duty & VAT →
8421 21 00 90	Other	UK duty & VAT →

Not a customs ruling. Classification is determined by the importing country's customs authority and depends on the exact product. This page is reference information from official published schedules, not legal advice. For a binding decision, request a ruling (US: CBP CROSS · UK: HMRC ATaR · EU: BTI).

Other subheadings in 8421

8421.00 8421 Centrifuges, including centrifugal dryers; filtering or purifying machinery and appar 8421.11 Cream separators 8421.12 Clothes-dryers 8421.19 Other 8421.21 For filtering or purifying water 8421.22 For filtering or purifying beverages other than water 8421.23 Oil or fuel filters for internal combustion engines 8421.29 Other 8421.31 Intake air filters for internal combustion engines 8421.32 Catalytic converters or particulate filters, whether or not combined, for purifying or fil 8421.39 Other 8421.91 Of centrifuges, including centrifugal dryers 8421.99 Other

Sources: U.S. International Trade Commission, Harmonized Tariff Schedule (public domain) · EU Combined Nomenclature © European Union, Eurostat (Decision 2011/833/EU) · UK Integrated Online Tariff, contains public sector information licensed under the Open Government Licence v3.0. Data refreshed weekly. Details on About & Data Sources.