"Theo" wrote in message
...
Harry Bloomfield, Esq. wrote:
They probably listen to the noise from flowing water, the flow will not
normally be continuous, unless there is a continuous leakage. Another
way would be to listen to the tick of a water meter, which should stop
completely for long periods of no water use.

From the horse's mouth:

: How does LeakBot work?
:
: Its not magic, its science. LeakBots patented Thermi-Q technology
: accurately measures both the air and water temperatures in your home.
: If you have a leak it will continually draw colder water from outside
into your home,

Thats bull**** at times.

: creating a consistent drop in temperature.

Wrong

: LeakBot can sense the prolonged and consistent
: drop in temperature and alerts you to the problem.