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Old 17.11.2020, 12:33
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Re: Lime problem with light plastics on dishwasher

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Every so often the Na ions in the ion exchanger are depleted and it is saturated with Ca ions. The exchanger must be regenerated by flushing it with a Na ion rich solution: Salt brine. Hence, the German term "Regenieriersalz" for dishwater salt (It is just plain NaCl w/o iodine and anti caking agent).
Makes sense, sort of, but in normal use the salt is used up, and there is no process for removing it and replacing with new, which is what I'd expect "flushing" to entail. One simply waits until the machine lights up the 'low salt' warning, then adds more salt up to the top.
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