A mixed-use commercial property in the North West. Four floors, partially tenanted, with a communal plant room and shared facilities. The building had been running a standard water meter for several years: read monthly, logged manually, and flagged only if the bill looked unusual.

Monitor Hut connected water monitoring across the site as part of a wider portfolio deployment. Within the first three weeks of live data, the platform flagged a sustained overnight flow on two consecutive nights. Water was moving through the main supply at a consistent rate between midnight and 5am with no occupancy scheduled and no automated systems that should have been drawing supply at that level.

The anomaly was not dramatic. It was not a burst pipe or an emergency. It was a slow, continuous draw of approximately 340 litres per night. The kind of flow that a monthly meter read would absorb into the background noise of general consumption without question.

A site visit identified a failed valve in a ground-floor WC cistern. The cistern had been running continuously into the drain, invisible to anyone not looking at real-time flow data.

The valve was replaced. Overnight consumption normalised within the same monitoring cycle, confirmed by the platform within 24 hours of the repair.