Carbon Block Filter End Caps
Precision-machined plastic caps sealing carbon block cartridges in water filtration housings. Essential retention components for water purification, HTS 8421.99.0140.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If generic plastic caps without filter sealing features
Plastic stoppers/lids without specific machinery function classify by material.
If end caps for industrial oil filters
Non-water filtration parts use general machinery provisions.
If rubber gasket components imported separately
Rubber tubes/profiles classify in Chapter 40.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Specify thread patterns (e.g
• 9-3/4" standard) and O-ring gland dimensions
• Include filter scoring data showing carbon block retention function
Related Products under HTS 8421.99.01.40
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Reverse Osmosis Membrane Housing
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