Third fill valve? The filter is the permanent solution
Caldwell ice maker fill valve calcium blockage follows the Treasure Valley pattern at slightly lower hardness — 160–220 PPM produces first failures at years five to seven for unfiltered installations. Older downtown Caldwell homes are often on their second or third fill valve without an inline filter in place.
If your Caldwell refrigerator has needed its ice maker fill valve replaced more than once, the underlying cause is Caldwell's 160–220 PPM water chemistry accumulating scale in each new valve on the same timeline. Replacing the valve again without installing an inline filter produces the same result 5–7 years later. The filter is the permanent solution.
An inline filter at the refrigerator supply connection costs $20–$40 and takes 15 minutes to install. It reduces incoming calcium by 90%+ — extending fill valve life from 5–7 years to 10–15 years. We install these on every Caldwell ice maker call where hard water is the cause.
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