Water purification systems classified as household type filters; exemption linked to the specific heading was unavailable.

Reverse osmosis water purification systems were treated as machinery for filtering or purifying water because the tariff entry for Heading 8421 21 uses those expressions synonymously for classification. The product literature showed multiple filtration stages and filter media, but the equipment still performed filtration of water and did not lose its character as a filter merely because it used reverse osmosis or other technologies. As the goods were commonly used in households, they fell under the specific entry for household type filters in Heading 8421 21 20 rather than the residual entry. The exemption linked to that heading was unavailable, while the concessional treatment for water filtration or purification equipment under Heading 8421 21 remained applicable.

---

---

Issues: Whether the imported reverse osmosis water purification systems were classifiable as household type filters under Heading 8421 21 20, and whether they were entitled to exemption under Notification No. 6/2006-C.E. on the footing that they were water purification equipment distinct from water filters.

Analysis: The tariff entry for Heading 8421 21 covered machinery for filtering or purifying water, and the expression "filtering or purifying" was treated as synonymous for classification purposes. The product literature showed that the goods used multiple filtration stages and different filter media to remove contaminants, but all stages performed filtration of water. Merely because the equipment used reverse osmosis and other technologies, or performed additional functions, it did not cease to be a filter. Since the goods were commonly used in households, they fell within the specific entry for household type filters under Heading 8421 21 20 and not the residual entry under Heading 8421 21 90. For the exemption, Sr. No. 8B of Notification No. 6/2006-C.E. excluded Heading 8421 21 20, while Sr. No. 8D covered water filtration or purification equipment under Heading 8421 21 and the concessional rate was applicable.

Conclusion: The goods were correctly classified under Heading 8421 21 20 as household type filters, the claimed exemption under Sr. No. 8B was unavailable, and the assessment and denial of the broader exemption were upheld. The appeals failed.

---