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WATER SOFTENER (SOME MODELS ONLY)
*ppm
= parts per million
|
**
gpg
= grains per gallon.
SETTING
WATER HARDNESS SCALES
PPM*
GPG**
°DH
°FH
°E / °CLARK
MMOL/L
0
0 – 100
0 – 6
0 – 5.6
0 – 10
0 – 7
0 – 0.1
1
100 – 250
6 – 14
5.6 – 14
10 – 25
7 – 17.5
0.1 – 2.5
2
250 – 350
14 – 20
14 – 19.6
25 – 35
17.5 – 24.5
2.5 – 3.5
3
350 – 450
20 – 26
19.6 – 25.2
35 – 45
24.5 – 31.5
3.5 – 4.5
4
450 – 550
26 – 32
25.2 – 30.8
45 – 55
31.5 – 38.5
4.5 – 5.5
5
550 – 625
32 – 36
30.8 – 35
55 – 62
38.5 – 43.8
5.5 – 6.2
Water hardness recommendations
z
Use the table below to determine the optimal water hardness setting. Your local water
company will be able to help.
z
If you have a household water softener installed, use the setting recommended for water
with a hardness under 100 ppm/6 gpg, irrespective of the water hardness in your area.
z
If your water hardness is above 625 ppm/36 gpg, the wash performance of your
DishDrawer™ Dishwasher will decline over time. The rinse aid setting should be at 5.
