Tap water in much of Turkey falls into the moderately hard to hard category, and the effect is invisible at first — until it quietly builds a scale layer inside dishwashers, combi ovens, ice machines and coffee equipment. Operators who skip a water test before installation often end up with a failed heating element and lost efficiency well before the warranty period ends.
How Is Water Hardness Measured?
Water hardness is expressed in °dH (German degrees) or ppm CaCO3, based on the concentration of calcium and magnesium ions. Anything above 14°dH is generally classed as hard, and some districts of Istanbul reach 20°dH or more depending on the season. Equipment manufacturers specify a maximum hardness value in the installation manual, and exceeding it can void the warranty.
How Scale Buildup Affects Equipment
Limescale forms an insulating layer on heating elements, which raises energy consumption and causes premature element failure. In combi ovens it clogs the steam generator's channels and disrupts cooking consistency; in ice machines it reduces both ice quality and output capacity. Most of these failures aren't anticipated simply because water hardness was never measured when the unit went into service.
Choosing a Softening or Scale-Prevention System
Resin-based ion-exchange softeners replace calcium and magnesium ions with sodium, permanently softening the water — the preferred choice ahead of dishwasher and combi oven lines. For lower-volume applications, polyphosphate dosing units or magnetic/electronic scale conditioners can offer a lower-cost middle ground, though they don't deliver results as reliably as a resin system. The right choice depends on daily water consumption and the measured hardness value.
Maintenance Schedule and Resin Renewal
A softening system still needs ongoing care after installation: resin salt must be refilled regularly, the regeneration cycle tuned to actual water use, and hardness re-tested annually. Operators who skip this upkeep end up with a softener that's technically installed but effectively inactive, while scale keeps accumulating unnoticed.
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