Freeze
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Freeze protection for an RV you are not standing in
A burst line is a five figure repair that announces itself hours after the temperature crossed the line. Monitoring does not stop the freeze. It buys you the hours.
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The split shows up at ten in the morning
Ice splits a fitting and then holds its own leak shut, so the expensive hour is the middle of the following morning. Which makes last night’s bay chart a prediction rather than a record.
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The pads are on a switch nobody checks
Holding tanks freeze slower than water lines and cost more when they go. The reading that matters is not the tank temperature – it is the difference between the tank and the bay around it.