Diatomite Pool Filter Block
Ceramic block composed of diatomaceous earth for use in swimming pool filtration systems, providing high porosity after firing. Falls under HTS 6901.00.00.00 as 'other ceramic goods' of siliceous fossil meals.
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 complete filtering machinery
Parts of filtering/purifying machines classify under 8421 if not standalone ceramic goods.
If refractory filter elements
Other refractory ceramic goods of similar earths classify in 6903 if high-temperature use.
If finished consumer articles like decorative planters
Other ceramic articles beyond Chapter 69 exclusions go to 6914.
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Import Tips & Compliance
• Provide porosity and absorption test results per ASTM C373 to confirm ceramic body characteristics
• Label clearly as 'diatomaceous earth ceramic' to differentiate from plastic filter media
• Watch for end-use declarations; industrial filters stay in 6901 but consumer pool toys go to Chapter 95
Related Products under HTS 6901.00.00.00
Diatomaceous Earth Firebrick
A high-temperature resistant brick made from diatomaceous earth (kieselguhr), a siliceous fossil meal, shaped and fired for use in industrial furnaces and kilns. It falls under HTS 6901.00.00.00 as a ceramic good specifically of siliceous fossil meals, providing superior insulation due to its low thermal conductivity.
Kieselguhr Insulating Brick
Insulating ceramic brick produced from kieselguhr (diatomite), offering excellent thermal resistance for boiler linings and high-heat applications. Classified under HTS 6901.00.00.00 due to its composition from siliceous fossil meals fired after shaping.
Tripolite Ceramic Block
Heavy-duty ceramic block made from tripolite, a siliceous fossil earth similar to diatomite, used in furnace construction. HTS 6901.00.00.00 covers such goods explicitly including 'similar siliceous earths' that are shaped and fired.
Kieselguhr Roofing Tile
Lightweight roofing tile manufactured from kieselguhr for thermal insulation in construction. HTS 6901.00.00.00 includes tiles of siliceous fossil meals, distinct from common clay tiles.
Tripolite Absorbent Brick
Absorbent ceramic brick from tripolite used in industrial spill control and chemical absorption. Classified in HTS 6901.00.00.00 for ceramic goods of similar siliceous earths fired after shaping.
Diatomaceous Earth Kiln Shelf
Fired ceramic shelf made from diatomite for supporting pottery in kilns, valued for lightweight insulation. HTS 6901.00.00.00 applies to such 'other ceramic goods' of siliceous fossil meals.