Paper Pulp Filter Block for Water Purification
A rigid block made from compressed paper pulp designed specifically for filtering impurities from drinking water in residential systems. It falls under HTS 4812.00.00.00 as it is a filter block explicitly made of paper pulp, meeting the heading's criteria for blocks, slabs, and plates used in filtration.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If assembled into a complete water filter housing
Assembled filter parts or cartridges fall under machinery parts in 8421, not raw paper pulp blocks.
If used for toilet or facial tissue filtration
Household sanitary paper products, even filter-like, are classified in 4818 if primarily for sanitary end-use.
If in rolls and not formed into blocks/slabs
Unformed filter paper in rolls goes to 4805 for other special purpose papers, not shaped pulp products.
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Import Tips & Compliance
• Verify the product is made predominantly from paper pulp via lab testing, as customs may require fiber content certification to confirm classification under 4812
• Include detailed technical specs on porosity, density, and filtration efficiency in import documentation to avoid reclassification as generic paperboard
Related Products under HTS 4812.00.00.00
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Plates molded from cellulose paper pulp for clarifying wine by removing sediments during production. HTS 4812.00.00.00 covers these as paper pulp filter plates.
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Industrial Paper Pulp Slab for Paint Filtration
Heavy-duty slabs from paper pulp for filtering impurities from industrial paints and coatings. HTS 4812.00.00.00 for filter slabs of paper pulp.
Paper Pulp Filter Plate for Coffee Brewing
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Paper Pulp Slab Air Filter for HVAC Systems
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