Distribution

Valve exercising, hydrant inspection, hydrant flow testing and unidirectional flushing each run on a cycle in months that the utility sets for a class of asset. Ithil works out each valve, hydrant and route's next due date from its latest record and reads it as current, due soon or overdue.

A hydrant keeps two clocks, one for inspection and one for flow testing, and shows whichever is more pressing. A flushing route counts only its latest completed run.

When an exercise finds a valve inoperable, or a hydrant visit needs repair or leaves the hydrant out of service, a corrective work order opens against that asset. The program shows the asset as inoperable or out of service until a later record says otherwise.

Exercises, hydrant visits and flushing runs are append only. Flow test pressures and the flowing hydrant are stored exactly as the crew recorded them, and a correction is a new record that follows the old one.

Pressure zones carry their hydraulic grade line and group the valves, hydrants and flushing routes that serve them. A daily check sends one digest per program of the entries that have newly gone overdue.