Meter racing where a workshop branch crosses a ditch
The property
A detached house at the village edge, with a workshop across the garden. Its water arrives through a buried branch that dips under a field ditch.
The problem
A letter warned of high, constant use. The house showed no damp, the workshop tap was dry, and nobody had seen a wet patch anywhere along the route.
How we found it
Closing the workshop branch valve stopped the meter, clearing the house. We walked the branch with the ground microphone; the sound was loudest at the ditch bank, and tracer gas rose there too.
The outcome
The leak had been draining into the ditch, which is why no wet patch ever showed. The repair at the mark was quoted on its own.