NSF 61 Wound Filter Cartridges

H.C. Warner, Inc. helped Parker develop the standard for R/O prefiltration wound filter cartridges: the HFT specification.  These cartridges are wound to a full 2.5″ diameter and are NSF 61 certified to be used in potable water applications.


  • Parker HFT filter cartridges are the industry standard for municipal RO filtration
  • All FDA polypropylene construction
  • Continuous wind up to 50″ length insure even particle loading
  • NSF 61 certified wound filter cartridges
  • 222 single open end configuration available
  • Made in USA for fast delivery times
  • HFT filter cartridge designed to meet all R/O requirements