Plumbing
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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 pump runs, and nobody is using water
A demand pump only runs when pressure falls, so with every tap shut it is either a leak or a passing check valve. One is a floor to replace and one is a job for next month, and one extra reading tells you which.