Hospitality and foodservice
Water for ice machines
Ice is a food ingredient. Water quality affects its clarity, taste and hygiene as well as the reliability of the machine, where scale on the evaporator slows production and disrupts ice harvest.
What water does inside an ice machine
As water freezes on the evaporator, the minerals it contains are pushed out of the ice and concentrate in the remaining water. Hardness then forms scale on the evaporator plates, the water distribution tubes and the level sensors. Production drops, harvest becomes irregular and the machine needs more frequent descaling.
Particles block inlet valves and distribution holes, and chlorine or organic compounds carry over into the taste and smell of the ice. Because ice is served directly in drinks, the water supply and the machine both need regular hygiene maintenance according to the manufacturer’s instructions.
Water parameters and usual treatment
| Parameter | Effect on ice and machine | Usual treatment |
|---|---|---|
| Hardness | Scale on the evaporator, slower production, irregular harvest | Treatment within the range accepted by the machine manufacturer |
| TDS (total dissolved solids) | Cloudy ice and deposits | Reverse osmosis where the machine is compatible |
| Particles | Blocked valves and distribution holes | Sediment filtration |
| Chlorine and organic compounds | Taste and odour in the ice | Activated carbon filtration |
| Microbiological quality of a private supply | Hygiene risk for a food product | UV disinfection on the supply, validated by analysis |
Some ice machine manufacturers do not accept fully softened or reverse osmosis water; their specification takes precedence.
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Frequently asked questions about water for ice machines
Why is my ice cloudy?
Cloudiness comes from dissolved minerals and air trapped as the water freezes. High hardness and dissolved solids make it worse. Filtration, and reverse osmosis on compatible machines, generally improve clarity.
Can softened water be used in an ice machine?
It depends on the machine. Sodium from softening changes how some machines freeze and harvest ice, and several manufacturers advise against fully softened water. Check the installation manual before connecting a softened supply.
How often should the filters and the machine be serviced?
Replace cartridges at their rated capacity or at the manufacturer’s interval, whichever comes first, and follow the machine manufacturer’s cleaning and sanitising schedule. Both intervals shorten when water use is high.
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