HS Code for Industrial liquid filter

Industrial liquid filters are classified under HS code 8421.29 according to the General Rules of Interpretation (GRI) 1 and 6. Heading 8421 is dedicated to centrifuges, including centrifugal dryers, and filtering or purifying machinery and apparatus for liquids or gases. Within this heading, the 8421.2 series focuses exclusively on liquid filtration systems. Subheading 8421.29 serves as a residual category for liquid filtering equipment that is not specifically designed for water purification (8421.21), filtering beverages other than water (8421.22), or filtering oil or fuel in internal combustion engines (8421.23). These industrial-grade filters are essential components in chemical processing, manufacturing, and specialized hydraulic systems. They function by passing a liquid through a medium—such as mesh, fabric, or sintered metal—to remove solid contaminants or chemical impurities. The classification remains consistent regardless of whether the filter is a standalone machine or a replaceable component, provided it meets the technical definitions of filtering apparatus under the Harmonized System Explanatory Notes for industrial applications.

Products Included

• Chemical processing filters
• Hydraulic fluid filtration units
• Industrial coolant filters
• Wastewater treatment filters (non-potable)
• Electroplating solution filters
• Paint and ink filtration systems

Common Misclassification

Industrial liquid filters are frequently confused with HS code 8421.21, which is strictly reserved for the filtering or purifying of water for human consumption or general water supply. Another common error is using 8421.23, which is specifically for oil or petrol filters used in internal combustion engines. If the filter is for gases rather than liquids, it must be classified under 8421.39.

FAQ

What is the HS code for industrial liquid filter?

The primary HS code for industrial liquid filters not used for water or engine fuel is 8421.29.

What is the difference between 8421.21 and 8421.29?

HS code 8421.21 is specifically for water filtering and purifying machinery, whereas 8421.29 covers all other liquid filtering machinery used in industrial processes.