Machinery for Filtering and Purifying Water

The dividing line is the process medium: machinery specifically designed and used to filter or purify water (including potable, process, and wastewater treatment applications) falls under this heading. Equipment designed to filter beverages other than water — such as beer, wine, or juice — is classified under the dedicated beverage filtration machinery heading.

While water purification machinery is not subject to mandatory FDA or USDA border admissibility review, equipment intended for drinking water contact in US municipal or commercial applications is typically required to meet NSF/ANSI Standard 61 (drinking water system components) or NSF/ANSI Standard 58 (reverse osmosis systems). Importers should obtain manufacturer certification documentation before tendering for public utility contracts.