Water hardness
Test paper
Calcium de‐
posit (mmol/l)
Calcium de‐
posit (mg/l)
Water classi‐
fication
Level
dH
1
0 - 7
0 - 1.3
0 - 50
soft
2
8 - 14
1.4 - 2.5
51 - 100
moderately
hard
3
15 - 21
2.6 - 3.8
101 - 150
hard
4
≥22
≥ 3.9
≥151
very hard
When the tap water hardness level is 4, fill the water drawer with still bottled water.
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BEFORE FIRST USE