Mexican Tariff (TIGIE) · tariff fraction · HS 8421.21

8421.21.04.00

8421.21.04.00: Water filtering and purifying machinery: Módulos de ósmosis inversa.

Water filtering and purifying machinery

✓ Can be used in a customs declaration Data: Mexican Tariff (TIGIE), in force from 14 October 2026 · checked on 24 October 2026

This line has no official text in this language; it is shown in the language of its tariff.

  1. 8421 Centrifugadoras, incluidas las secadoras centrífugas; aparatos para filtrar o depurar líquidos o gases.
  2. 8421.21 Para filtrar o depurar agua.
  3. 8421.21.04 Módulos de ósmosis inversa.
  4. 8421.21.04.00 Módulos de ósmosis inversa.

What you pay

Importing into Mexico

Customs duty Free standard rate depends on the country of origin

Customs duty only: import VAT, other taxes and trade defence duties of this country are not covered here, and the duty calculator works only with the EU, Türkiye, US and UK tariffs.

Same subheading in other tariffs

8421.21 For filtering or purifying water

UK Free Third-country duty 2 tariff lines EU 1.7% Third-country duty 1 tariff line Türkiye 1.7% Third-country duty 1 tariff line USA Free General (MFN) 1 tariff line Canada Free General (MFN) 1 tariff line Brazil 20% General (MFN) 1 tariff line Argentina 12.6% General (MFN) 2 tariff lines Peru Free General (MFN) 2 tariff lines New Zealand Free General (MFN) 1 tariff line Japan Free General (MFN) 1 tariff line Taiwan 3.4% – 4% General (MFN) 2 tariff lines · average 3.7% GCC 5% General (MFN) 4 tariff lines Switzerland Free General (MFN) 1 tariff line Norway Free General (MFN) 1 tariff line North Macedonia Free General (MFN) 1 tariff line Nigeria 5% General (MFN) 2 tariff lines

Mexico lines: 8421.21

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.

  • N361715 U.S. CBP 3 June 2026 · 8421.21.00.00

    The tariff classification of a robot pool cleaner from Vietnam

  • N360559 U.S. CBP 23 April 2026 · 8421.21.00.00

    The tariff classification and country of origin of the Lex Aqua closed-loop water treatment system

  • N359248 U.S. CBP 17 March 2026 · 8421.21.00.00

    The tariff classification of a robotic pool skimmer from China

  • N359001 U.S. CBP 10 March 2026 · 8421.21.00.00

    The tariff classification, country of origin, and eligibility of the United States-Mexico-Canada Agreement of an Electrochemical Water Purification System

  • 600014420 HMRC 14 January 2026 – 13 January 2029 · 8421 21 00 90

    Salt system cartridge. Made from 2 metal plates with plastic handles, the function is to purify water in hot tubs. Fitted into a custom-made chamber on the hot tub rim, the metal plates are suspended in the water and react with salt to create naturally produced chlorine, to purify the water. The…

57 rulings in total for this code

Legal notes

Chapter notes: Chapter 84 →

In the Mexican Tariff (TIGIE), 8421.21.04.00 is one of 5 lines under subheading 8421.21, for filtering or purifying water.

The import duty (IGI) is free, and quantities are declared in Pza.

For the same subheading, the UK duty is free, the EU duty is 1.7%, the Türkiye duty is 1.7%, the US duty is free, the Canada duty is free, the Brazil duty is 20%, the Argentina duty is 12.6%, the Peru duty is free, the New Zealand duty is free, the Japan duty is free, the Taiwan duty is 3.4%–4%, 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%.

Mexico imported goods of subheading 8421.21 worth US$314m in 2024; the largest supplier was the United States.

Questions and answers

What is the Mexico import duty for tariff fraction 8421.21.04.00?

The import duty (IGI) in the Mexican Tariff (TIGIE) is free; the supplementary unit is Pza. This page shows the rate as published by the national source and, where the source publishes them, preferential rates: choose the country of origin to see them. Trade defence duties and VAT are not covered.

Where does Mexico import these goods from?

For subheading 8421.21 as a whole, the largest supplier in 2024 was the United States (US$145m), followed by China.

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Typical products

Everyday names, not part of the legal text.