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Universal String Wound Filtration

GreenStory Global Filtration Made in the USA

Our GreenStory GSGWF WN, WC, WE, WP, WS series of string wound filters are manufactured in-house on custom, high-speed, computer-controlled machines for consistent thread spacing.  With a variety of media, micron, end cap, and core options, GreenStory can meet the challenge of your unique filtering needs.


  • Polypropylene string wound cartridges are Tested and Certified to: 

    • NSF/ANSI/CAN 42, 61, CSA B483.1 (material safety)

    • NSF/ANSI 372 (low lead)

  • Polypropylene FDA, Polyester and Bleached Cotton FDA materials comply with FDA Title 21, Section 177, as applicable for food and beverage contact

  • Polypropylene components meet specifications for biological safety per USP Class VI (121⁰C) plastics


  • Construction

    • Media

      • Natural Cotton, Polyester, Polypropylene

      • Bleached Cotton FDA, Polypropylene FDA

    • Cores: Polypropylene, Tinned Steel

    • Diameters: 2.5” and 4.5”

    • Lengths: 9.75” – 40”, see Part Number Builder for all options

    • Micron ratings: 1-100, see Part Number Builder for all options

    • Multiple end cap configurations: see Part Number Builder for all options

  • Applications and Temperatures, see Specifications Table

GreenStory Global Water Filtration WN WC WE WP WS Universal String Wound Filters
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