The Hoshizaki, H9655-11, One Replacement Water Filter is perfect for food service applications and ice machines. This 2 gpm, 0.5 micron rated, is Works in single, twin & triple configuration water filter systems. Keep ice makers functioning at full capacity. The 4HC-H Reduce up to 97.3% of disinfectant chlorine from incoming water supply, eliminating tastes and odors from the ice. Replace approximately every 21,000 gallons or 6-12 Months depending on usage and water condition. NSF Standard 42