Classification of replacement filter cartridges under heading 8421 upheld for dedicated use in filtration systems.

Complete polymeric media filter cartridges, sealed capsule filters and metallic media filter cartridges imported as replacement units are classifiable as parts of filtering machinery under tariff item 8421 99 00, because they are complete, identifiable cartridges designed for direct installation in filtration systems. Applying Rule 1 of the General Rules for Interpretation and Note 2(b) to Section XVI, the decisive test was whether the goods were suitable solely or principally for use with heading 8421 machinery; their integrated construction and dedicated use satisfied that test. The Authority also relied on the distinction between standalone filtering media and complete filters in CBIC Circular No. 24/2013-Cus. and the HSN Explanatory Notes.

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Issues: Whether complete polymeric media filter cartridges, sealed capsule filters, and metallic media filter cartridges imported as replacement filtration units are classifiable under tariff item 8421 99 00 as parts of filtering or purifying machinery and apparatus for liquids or gases.

Analysis: The goods were found to be complete and identifiable replacement filter cartridges, not standalone filtering media such as sheets, blocks, fabrics, meshes, or membranes. Their construction included filtering media integrated with support cages, end caps, sealing components, and mounting interfaces, showing that they were designed for direct installation in filtration systems. Applying Rule 1 of the General Rules for Interpretation and Note 2(b) to Section XVI, the determining question was whether the goods were suitable for use solely or principally with machinery of heading 8421. The Authority also relied on the distinction drawn in CBIC Circular No. 24/2013-Cus. and the HSN Explanatory Notes between standalone filtering elements classified by constituent material and complete filters classified under heading 8421. The different filtration media used in the goods did not alter their essential character or dedicated use as replacement filtration cartridges.

Conclusion: The subject goods are classifiable under heading 8421 and specifically under tariff item 8421 99 00 of the First Schedule to the Customs Tariff Act, 1975.

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