Water lost under a shop floor in the old centre
The property
A shop in the old centre with a flat above on its own supply, and a back kitchen fed by a pipe under the shop floor.
The problem
The business water bill had risen sharply, and the meter turned with the shop shut and every tap off. Nothing inside was wet.
How we found it
Shutting the back kitchen stop tap did not stop the meter, so the pipe under the shop was leaking. The ground microphone peaked behind the counter; tracer gas surfaced there.
The outcome
We marked and photographed the spot on the floor. The building was on the landlord's policy, so the owner passed our report on; the repair was quoted separately.