Instructions for use
18
Water Softener
For medium to high water hardness (hardness category II or higher) you
should use water softener. Pay attention to the manufacturer's instruc-
tions. Always then meter detergent for hardness category I (= soft). The
responsible water works can provide information on the local water
hardness.
2
Since the water softener is added before the main washing detergent,
(water pre-softening), eighty percent of the softener quantity stated on
the package is sufficient.
Water Hardness Details
Hardness Category
Water Hardness °dH
(degrees German
hardness)
Water Hardness in mmol/l
(millimol per litre)
I – soft 0 - 7 up to 1.3
II – medium hard 7 - 14 1.3 - 2.5
III – hard 14 - 21 2.5 - 3.8
IV – very hard over 21 over 3.8
