homeburrero wrote:your easiest solution will be to use bottled water

I think the OP said he's using bottled water.. maybe change brand

My water (bottled) has about 20mg/l calcium and 60 bicarbs. Chloride not even mentioned so I assume it's very low. Just as a reference. 80mg/l TDS

Thanks all for replying, the main question is how safe is it to use the coffee machine in this condition? The water from the boiler is just awful, mainly I don't use it in this way, but I'm not at all sure that this water gets through the the group or steam wand in the same way.
I began to fear that I might have encountered a similar problem:
Lelit PL41 turning water milky white...weird
In your opinion , is it possible to exclude it without disassembling the boiler ?
Meanwhile I wrote to lelit support. No response yet.

Thanks again!

Yes it is possible.
The filler in heating elements is MgO.

homeburrero wrote:your easiest solution will be to use bottled water

ojt wrote:I think the OP said he's using bottled water.. maybe change brand

You're right! I didn't notice that in the first post. This is a good example that one needs to carefully choose a good bottled water - The OP's choice looks like it was remineralized with a hefty amount of calcium chloride. Easy way to get soluble calcium into the water, but a terrible choice for use in an espresso machine.

What turned out to be the result?

mg / litter

Calcium 80
Magnesium 19
Potassium 5.5
Sodium 6.5
Chloride 170
Sulfur 18
Carbohydrates 10
Fluoride 0.3


Just curious what carbohydrates are in the water?

Apparently these are the "difficulties" of translation.
Carbohydrates = hydrocarbonate.

OK. though the OP is listed as posting in the US and I figured no translation was involved. Nonetheless, you are probably correct.