Smeg DWD409WH - Manual (Page 15)

User instructions
43
WATER HARDNESS TABLE
WATER HARDNESS
German Degrees (°dH) French Degrees (°dF)
SETTING
0 - 4 0 - 7 Setting N. 1 NO SALT
5 - 9 8 - 15 Setting N. 1
10 - 17 16 - 30 Setting N. 2
18 - 26 31 - 45 Setting N. 3
27 - 35 46 - 60 Setting N. 4
36 - 47 61 - 80 Setting N. 5
Contact your local water board for information on the hardness of your
water supply.
4.2 Using the rinse aid and detergent dispensers
The detergent and rinse aid
dispensers are situated on the inner
part of the door: the detergent
dispenser is on the left, and the rinse
aid dispenser is on the right.
With the exception of the SOAK program, before every washing cycle it
is necessary to add the required amount of detergent to the detergent
dispenser. The rinse aid, on the other hand, should only be added as
required.