# Non-revenue water briefing

*Network operations. Sample document: synthetic data.*

Foundry Row zone (PZ8) loses about a third of the water supplied; its cast iron mains from before 1962 fail most often, and failures peak every winter.

Low pressure complaints come mostly from Foundry Row zone, fed from Kloof Reservoir.

- Replace the priority 1 mains in Foundry Row zone first.
- Exercise the isolation valves marked unknown.
- Install pressure management on the zone inlet.