Reverse Osmosis Water Purification System
A residential reverse osmosis system that uses a semi-permeable membrane to filter and purify water by removing dissolved solids, bacteria, and contaminants. It falls under HTS 8421.21.00.00 as machinery specifically designed for filtering or purifying water for household or small-scale use.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If used for beverages or non-potable liquids
Shifts to general liquid filtration if not specifically for water purification.
If primarily for medical or laboratory water treatment
Medical water purification apparatus classified separately in Chapter 84 heading for medical devices.
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Import Tips & Compliance
• Verify system capacity and intended use (e.g
• residential vs. industrial) to confirm classification under 8421.21
• Include NSF/ANSI certification documentation to meet U.S. drinking water standards and avoid customs delays
• Label components clearly to distinguish from general liquid filtration machinery in 8421.19
Related Products under HTS 8421.21.00.00
Commercial Ultraviolet Water Purifier
An industrial UV sterilizer that uses ultraviolet light to disinfect water by inactivating bacteria, viruses, and other pathogens without chemicals. Classified under HTS 8421.21.00.00 for its specific function in water purification processes.
Activated Carbon Water Filter Cartridge System
A multi-stage filtration unit using activated carbon cartridges to remove chlorine, odors, and organic compounds from municipal water supplies. It qualifies under HTS 8421.21.00.00 due to its dedicated water purification design.
Industrial Microfiltration Water Purifier
Membrane-based microfiltration system that removes suspended solids, microorganisms, and particulates from process water in manufacturing facilities. Falls under HTS 8421.21.00.00 for water-specific purification machinery.
Whole House Sediment Water Filter
Large-capacity spin-down sediment filter for residential whole-house systems that removes sand, rust, and debris from well or municipal water. Classified in HTS 8421.21.00.00 as water purifying apparatus.
Portable Backpacking Water Purifier Straw
Personal hollow fiber membrane straw purifier that filters up to 1,000 liters of water from streams, removing 99.9999% bacteria and protozoa. HTS 8421.21.00.00 covers portable water purification devices.
Distillation Water Purification Unit
Countertop water distiller that boils and condenses water to produce mineral-free distilled water for drinking or lab use. Falls under HTS 8421.21.00.00 for thermal water purification processes.