13: CTS 400 Flex Owner’s Guide
Hard Water Area Map
The hard water map, shown in Figure 1
defines hard water areas in the continental United
States which compromise fluid related components such as hoses, fittings, heaters,
pumps, valves and water-cooled engines. For other countries, hard water area maps can
be obtained from geological societies.
Figure 1. Hard Water Map of Mainland United States
The map shown in Figure 1 is provided for general reference only. Water hardness
in your geographical location should be confirmed by testing.
