An ice machine water filter does three jobs: it traps sediment before it reaches the water valve and evaporator, it reduces chlorine taste and odor, and in most commercial cartridges it adds a scale inhibitor to slow mineral buildup. It does not soften water, it does not make unsafe water safe, and it does not replace cleaning. Size it to your machine and change it on time, and you protect both ice quality and production.
If your machine is already making thin or cloudy cubes, start with our ice machine troubleshooting guide. This guide goes deeper on the filter itself: what is inside, how to size it, and how to keep a filter change schedule.
What an ice machine water filter does and does not do
Manitowoc’s Arctic Pure spec sheets describe the job plainly: inhibit scale and reduce chlorine, taste, odor, dirt and particulate. Icetro pitches its IcePro series the same way, pairing 5 micron carbon filtration with Citryne, its patented scale control blend. Manitowoc’s sheets also set the limits: do not use the filters with water that is microbiologically unsafe or of unknown quality without disinfection, and protect them from freezing, or the housing can crack and leak. A filter improves city water that is already safe to drink. On a well or a known problem supply, test and treat first, then filter.
Scale buildup in an ice machine and why it costs you
Hard water carries dissolved calcium and magnesium. As water freezes on the evaporator, the minerals stay behind and build into scale. Scale insulates the evaporator, so freeze cycles run longer, and it makes cubes stick so harvest slows. Longer cycles mean less ice for the same electricity, which is why our ice machine energy cost guide counts regular cleaning among the ways to cut running costs.
A scale inhibitor (commonly a polyphosphate blend, or Citryne in Icetro systems) keeps more minerals in suspension so they leave with the purge water. It slows scale; it does not remove minerals or stop scale on very hard water.
Types of ice machine filters
Sediment prefilter
A coarse cartridge that catches sand and pipe debris so the primary cartridge lasts longer. The Follett SEDIMENTPREFILTER cartridge (listed at $113.00) is listed as compatible with the 00978957 system and several Follett carbon systems; Manitowoc’s equivalent is the AR-PRE-P.
Carbon for taste and odor
Activated carbon reduces chlorine, the taste most people notice in ice made from city water, and adds fine sediment filtration, 5 micron on most cartridges we carry. Manitowoc’s 0.5 micron K00531 is also certified for cyst reduction.
Scale inhibitor
Usually built into the same cartridge. If the spec sheet does not list scale inhibition, it is a taste and sediment filter only.
Cartridge vs system
A system includes the filter head and first cartridge; after that you buy replacement cartridges. The Icetro IcePro 400, 800 and 1300 are systems with matching R cartridges. Manitowoc NEO machines with integrated filtration take the cartridge directly.
How to size an ice machine water filter
- Daily ice production. Match the filter to your machine’s rated lb per day. Manitowoc’s Arctic Pure Plus spec sheet rates the AR-10000-P for up to 450 lb per day, AR-20000-P for 500 to 900 lb, and AR-40000-P for 1,000 to 2,100 lb.
- Rated flow (GPM). The filter must keep up with the fill valve. An undersized filter starves the machine, which shows up as short fills and thin cubes.
- Capacity in gallons. This sets cartridge life. A bigger or busier machine uses more water and reaches the rating sooner. On a water-cooled unit, condenser water normally runs on its own line.
Between two sizes, go up. An oversized cartridge simply lasts to its time limit; an undersized one clogs early.
Our ice machine filters and their listed specs
Prices are at the time of writing.
| Filter | Machine size | Flow | Capacity or life | Price |
|---|---|---|---|---|
| Manitowoc K00530 (5 micron) | Up to 400 lb/day | 0.32 GPM | 4,000 gal | $65.48 |
| Manitowoc K00531 (0.5 micron) | Up to 400 lb/day | 0.32 GPM | 4,000 gal | $94.13 |
| Manitowoc K00532 (5 micron) | Up to 400 lb/day | 0.32 GPM | 4,000 gal | $57.30 |
| Icetro ICEPRO 400 | Up to 400 lb/day | 2.8 GPM | 6 months | $306.00 |
| Icetro ICEPRO 800 | Up to 800 lb/day | 3.5 GPM | 6 months | $404.00 |
| Icetro ICEPRO 1300 | Up to 1,300 lb/day | 5.5 GPM | 6 months | $584.00 |
| Icetro ICEPRO 2500 | 1,500 to 3,000 lb/day | Not listed | Not listed | $670.00 |
| Icetro ICEPRO DIS | Ice and water dispensers | Up to 1 GPM | Not listed | $318.00 |
| Follett 00978957 | All Follett ice machines and dispensers | Not listed | 15,000 gal | $745.00 |
The three Manitowoc cartridges fit NEO machines with integrated filtration; their figures come from Manitowoc’s NEO cartridge spec sheet, which calls them Arctic Pure Pro. The IcePro 6 month life is from Icetro’s IcePro series sheet. The ICEPRO DIS adds a second carbon stage and suits the setups in our hotel ice dispenser guide. See more on our Manitowoc brand page.
Filter change schedule: months, gallons or pressure
Change the cartridge at whichever comes first:
- Time. Manitowoc recommends replacing its cartridges at least every six months, and Icetro lists a 6 month cartridge life, even at low volume.
- Gallons. Replace before the rated capacity is reached. A busy bar uses up gallons far sooner than a quiet office. Real life also depends on your water; Follett’s filter systems page says its carbonless system capacity is based on water conditions.
- Flow or pressure drop. Manitowoc says to replace the cartridge when flow becomes inconveniently slow. If your system has a pressure gauge (Icetro’s IcePro 2500 sheet lists one), note the reading with a new cartridge and change it when it falls noticeably. Manitowoc gives operating ranges of 10 to 125 psi for NEO cartridges and 30 to 125 psi for Arctic Pure Plus.
Write the install date on the cartridge and keep a spare on hand.
Changing a cartridge
Follow your filter’s own instructions. Manitowoc’s NEO steps: turn the machine off, open the filter panel, turn the cartridge slowly left until it releases (this closes the ports and relieves pressure), fit the new one with a quarter turn right, then run the Flush Sequence, which flushes the filter for 5 minutes and resets the filter light. For Arctic Pure Plus heads, Manitowoc says to flush at full flow for five minutes. New water lines or system installs should follow local plumbing code, and a licensed plumber has the final word.
Water testing and when a filter is not enough
A hardness test tells you how fast scale will form. Many utilities publish hardness in their annual water quality report, or a water treatment company can test on site. If scale returns quickly after a descale, a standard filter is not enough; ask a qualified water treatment or ice machine service company about extra treatment before adding a softener.
Filters do not replace cleaning
Minerals and biofilm still collect with the best filter. Manitowoc manuals call for cleaning and sanitizing at least every six months, more often with hard water. A filter stretches the time between descales; it does not remove the need. Schedule the cartridge change and the cleaning together.
Frequently asked questions
Do I really need an ice machine water filter?
On most city water, yes. Manitowoc and Icetro both position their filters as protection against scale, chlorine taste and sediment.
How often should I change an ice machine water filter?
At least every six months, or sooner if you reach the rated gallons or flow drops. That filter change schedule matches what Manitowoc and Icetro list.
Can a filter stop scale buildup in an ice machine completely?
No. A scale inhibitor slows buildup, but you still need to clean and descale per your manual.
Can I use a bigger filter than my machine needs?
Yes, within reason. A higher capacity cartridge lasts longer by gallons, but still change it on the time limit.
Not sure which filter fits your machine? Send us the model number and we will help you match it. Call 866-777-2590, Monday to Friday 9AM to 6PM PST. We offer free freight shipping on orders of $999 or more, and our return and refund policy has the details. For the rest of your kitchen, see our commercial kitchen equipment guide.
