Preparing the wash cycle 29
Degrees of water hardness
Water hardness is classified in so-called “degrees” of hardness. Information on hardness of the water in your area can be obtained from the relevant water supply company, or from your local authority.
Note: A water softener must be added when water has a medium-high degree of hardness (from degree of hardness II). Follow the manufacturer’s instructions. The quantity of detergent can then always be adjusted to degree of hardness I (= soft).
| | Degrees of water hardness |
Level | Characteristic | German | French |
| | °dH | °T.H. |
1 | soft | 0-7 | 0-15 |
2 | medium | 8-14 | 16-25 |
3 | hard | 15-21 | 26-37 |
4 | very hard | > 21 | > 37 |
