For filtering or purifying water
Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for liquids: > For filtering or purifying water
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified under HTS 8421.21.00.00
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.
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.
Ion Exchange Water Softener System
Residential water softener using cation exchange resin to remove hardness minerals (calcium, magnesium) from water, preventing scale buildup. Classified under HTS 8421.21.00.00 as water purifying apparatus.
Ceramic Doulton Water Filter Candles System
Gravity-fed ceramic filter system with silver-impregnated Doulton candles that remove bacteria, cysts, and sediments from water without electricity. HTS 8421.21.00.00 for ceramic water purification.
Electrodeionization Water Purification Module
EDI module using electrical current and ion-exchange membranes to continuously deionize water for high-purity applications like pharmaceuticals. Under HTS 8421.21.00.00 for advanced water purification.
Pool and Spa Ozone Water Purifier
Ozone injection system that generates O3 gas to oxidize contaminants in swimming pool water, reducing chlorine needs. Classified in HTS 8421.21.00.00 despite recreational use due to water purification function.
Berkey Gravity Water Filtration System
Countertop gravity-fed stainless steel water purifier with Black Berkey elements removing pathogens, heavy metals, and chemicals from any water source. HTS 8421.21.00.00 for complete purification systems.
Commercial Reverse Osmosis Membrane Skid
Pre-assembled RO skid with high-pressure pumps, membranes, and controls for producing purified water in bottling plants. Falls under HTS 8421.21.00.00 for water purification machinery.
Nanofiltration Water Treatment System
Nanofiltration membrane system removing divalent ions, organics, and color while retaining beneficial minerals from water. Classified under HTS 8421.21.00.00 for specialized water purification.
Hydrogen-Rich Water Generator
Electrolysis-based countertop device producing hydrogen-infused alkaline water claimed for antioxidant benefits. HTS 8421.21.00.00 as water purification/pH adjustment apparatus.