Culligan M1 Series Installation, Operation And Service Instructions page 81

Feed Water Limits
Before starting the installation, verify that the feed water meets the limits shown in Table 7 and that a water softener is
used for pretreatment.
Property
Turbidity (NTU)
pH*
Chlorine (ppm)
Total Dissolved Solids (ppm)
Temperature (°F)
Silt Density Index
Iron (ppm)
*Short term cleaning is acceptable for pH ranges between 2.0/12.0. Additional treatment is required when chloramines are
present and the pH levels exceed 9.0.
NOTICE In some applications, a water softener is not required. Consult an independently operated Culligan
dealer for further information on these special applications.
Cat. No. 01022940
Minimum
0.0
6
0.0
50
33
0.0
0.0
Table 7. Feed water limits.
Maximum
1.0
11
0.1
2500
100
5.0
0.1
Basic Principles 77