Before the visit
Check whether water is moving through the meter
With every faucet, appliance and fixture off, look at the water meter and note the reading and the small leak indicator many meters have. Leave everything off for a while, then look again. Any movement suggests water is flowing somewhere on the property.
A still meter does not rule out every leak. A drain line only carries water when fixtures are used, and some leaks come and go. Share what you saw either way; it helps the plumber decide where to look first.
