United 20" Big Blue 30 Micron String Wound Polypropylene Filter

United Filters International (UFI) specializes in manufacturing high-quality water filtration products designed for residential, commercial, and industrial applications. With decades of filtration experience, United Filters produces reliable cartridge filters used to improve water quality, protect equipment, and support dependable system performance in a wide range of water treatment environments.

United Filters water solutions include a broad range of pleated, string wound, melt blown, carbon, and specialty filters engineered for sediment reduction, pre-filtration, and general water purification applications. Known for dependable construction and consistent filtration performance, these filters are widely used in point-of-use, point-of-entry, and reverse osmosis pre-filtration systems.

About United Filters International – Filter Cartridges

The UFI product range includes pleated polyester and polypropylene filters, string wound polypropylene cartridges, melt blown sediment filters, carbon filters, and other specialty filtration options for a variety of water treatment needs. These filters are available in common industry sizes including standard 10" and 20" cartridges as well as Big Blue formats used in higher-capacity residential and commercial filtration systems.

UFI cartridges are designed to support sediment reduction, pre-filtration, and general water purification where dependable flow, particle retention, and long service life are important. Popular options include pleated polyester cartridges in multiple micron ratings, absolute-rated polypropylene filters, and string wound sediment filters suited for a wide range of water system applications.

If you are looking for a specific UFI cartridge, pleated sediment filter, string wound filter, or replacement water filter not listed on this page, please contact us by email or call our office (1-866-489-4004) for assistance. Our team can help identify the correct UFI cartridge for your water filtration system.

Browse our full selection of UFI filters and get dependable filtration components shipped FAST from our Canadian warehouse DIRECTLY to your door. A real Water Guy can help you select the right replacement filter for your water treatment application.