Guides
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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.
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Same water, one night or one winter
The water on the window this morning and the mold behind the mattress in February are the same water, arriving at different speeds. One sensor at the glass predicts tonight; a cheap multipack in the cold corners predicts the winter.
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Fresh going down, gray coming up
A tank that will be a problem on Thursday is already saying so on Tuesday. How to read fresh, gray and black, and why the two directions together catch a leak that neither number catches alone.
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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.
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Put a bottle of water in the fridge and watch that instead
An air sensor in the fridge alerts on every door opening. A probe in a bottle of water alerts when the food is actually warming, which is a different and much more useful thing. Five methods, and what each one cannot see.
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A door is a moment. Water is an afternoon.
A bay can be opened, emptied and shut again between two polls, and the door sensor will honestly show nothing. What a person cannot do is put back the water they used or the propane they burned.
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Heat gets there before pressure does
The earliest signal is one wheel behaving differently from the wheel opposite it – and that comparison is the one thing the app cannot do for you, so it stays a habit rather than an alert.