HS code · 6-digit subheading
HS Code 8421.99 – Machinery; parts for filtering or purifying liquids or gases
HS code 8421.99 is the 6-digit subheading for machinery, parts for filtering or purifying liquids or gases. It is used for filter cartridges, filter membranes, filter housings, filter media and gaskets for filters.
What HS 8421.99 covers
This HS code serves as a residual category for parts of filtering or purifying machinery for liquids or gases, not specifically covered elsewhere (e.g., not centrifuge parts). This encompasses a vast array of components essential for the maintenance, repair, and upgrade of diverse filtration and purification systems, from industrial water treatment plants to commercial air purifiers. The trade in these parts is driven by the need to sustain operational efficiency and extend the lifespan of capital equipment across various sectors. Importers include MRO (Maintenance, Repair, and Operations) suppliers, industrial facilities, and equipment service providers. Exporters are typically component manufacturers and specialized suppliers, reflecting the global interconnectedness of industrial supply chains.
- Covers
- Filter cartridges
- Filter membranes
- Filter housings
- Filter media
- Gaskets for filters
- Valves for filtration systems
- Pressure gauges for purifiers
- UV lamps for water purifiers
- Examples
- Pall filter cartridges
- Pentair filter housings
- Gore-Tex membranes
- Siemens water treatment parts
- Parker Hannifin filter elements
Codes often confused with 8421.99
Common mistake. This is a residual category for parts, so it's often confused with more specific parts categories like 842191 (centrifuge parts) or even the complete machinery if the part is a major sub-assembly.
Top exporters and importers of HS code 842199, 2025
In 2025, the largest exporter of HS code 842199 in UN Comtrade data was China, with 23% of world exports; the largest importer in UN Comtrade data was the United States, with 12% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Top exporters 2025 · share of world exports
- 1 China $4.3B 23% of world exports
- 2 Germany $2.8B 14% of world exports
- 3 United States $2.5B 13% of world exports
World total: $19.2B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $2.4B 12% of world imports
- 2 China $1.4B 7.6% of world imports
- 3 Germany $1.3B 6.6% of world imports
World total: $18.9B Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM codes for 8421.99 4
Brazil splits HS 8421.99 into 4 NCM codes, Mercosur's 8-digit tariff lines.
- 8421.99.10 Parts of other gas filtering apparatusDe aparelhos para filtrar ou depurar gases, da subposição 8421.39
- 8421.99.20 Filter parts for haemodialysis blood linesDo tipo utilizado em linhas de sangue para hemodiálise
- 8421.99.9 OtherOutras Group
- 8421.99.91 Reverse osmosis membrane cartridgesCartuchos de membrana de aparelhos de osmose inversa
- 8421.99.99 Other parts of filtering or purifying machineryOutras
All Brazil NCM codes in heading 84.21 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 8421.99
What is HS code 842199?
HS code 842199 is a 6-digit subheading in the Harmonized System that covers: Machinery; parts for filtering or purifying liquids or gases. This HS code serves as a residual category for parts of filtering or purifying machinery for liquids or gases, not specifically covered elsewhere (e.g., not centrifuge parts). This encompasses a vast array of components essential for the maintenance, repair, and upgrade of diverse filtration and purification systems, from industrial water treatment plants to commercial air purifiers. The trade in these parts is driven by the need to sustain operational efficiency and extend the lifespan of capital equipment across various sectors. Importers include MRO (Maintenance, Repair, and Operations) suppliers, industrial facilities, and equipment service providers. Exporters are typically component manufacturers and specialized suppliers, reflecting the global interconnectedness of industrial supply chains.
What products fall under HS code 842199?
Filter cartridges, filter membranes, filter housings, filter media, gaskets for filters, valves for filtration systems, pressure gauges for purifiers, UV lamps for water purifiers
What are common misclassifications for HS code 842199?
This is a residual category for parts, so it's often confused with more specific parts categories like 842191 (centrifuge parts) or even the complete machinery if the part is a major sub-assembly.
Which countries are the top exporters of goods under HS code 842199?
In 2025, the top exporters of HS code 842199 in UN Comtrade data were China ($4.3B, 23% of world exports), Germany ($2.8B) and the United States ($2.5B). World exports came to about $19.2B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of goods under HS code 842199?
In 2025, the top importers of HS code 842199 in UN Comtrade data were the United States ($2.4B, 12% of world imports), China ($1.4B) and Germany ($1.3B). World imports came to about $18.9B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
How is HS code 842199 structured?
HS code 842199 is a 6-digit subheading under the Harmonized System. The first 2 digits (84) identify the chapter, digits 3-4 (21) identify the heading, and digits 5-6 (99) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 842199?
Brazil splits HS code 842199 into 4 NCM codes: 8421.99.10 (Parts of other gas filtering apparatus), 8421.99.20 (Filter parts for haemodialysis blood lines), 8421.99.91 (Reverse osmosis membrane cartridges), 8421.99.99 (Other parts of filtering or purifying machinery). The first 6 digits of each match the HS code.