1. Water Service Forum
By Cecil Kekana 24 May 2017

2. Pressure Management as measure to reduce consumption
BACKGROUND Johannesburg Water initiated the project in 2012 with the objective of reducing water loss and pipe bursts through the servicing and repair of pressure reducing valves (PRVs) and the re-establishment of existing water management zones. The project involved all 10 JW depots (Avalon, Ennerdale, Hamburg, Klipspruit, Langlaagte, Midrand, Randburg, Southdale, Zandfontein North and Zandfontein South).

3. Key Johannesburg Water Statistics

4. Flow and Pressure

5. OBJECTIVES Assessment of PRV’s
Servicing of control valves, pilot valves and Strainers
Confirming discreteness of pressure management zones (PMAs)
Measuring pressure and flow before and after to assess the impact of the project.
Identify further water loss reduction using Advanced Pressure Management.

6. PROJECT BENEFITS & SUMMARY
Reduce leakage
Reduction in number of burst pipes
Consumption Reduction
Prolong infrastructure lifespan
Identification of bottlenecks in the system
Sustainable savings
SUMMARY
764 PRVs assessed
364 PRV Zones discreteness confirmed
542 Pilot Valve and Control Circuit Serviced
259 Strainers cleaned
27 Advance Pressure Management installations were commissioned

7. Overall Zone Discreetness Summary

8. . .

9. Financial Requirements For WC/WDM Initiatives
The table below indicates the anticipated budget requirements for the strategy activities (2016/17 budget is approved )

10. Rehabilitation of Advance Pressure Management Zones.

14. REDUCTION OF CONSUMPTION

15. SUSTAINABLE CONSUMPTION

16. CHALLENGES
Vandalism
Maintaining zone discreetness
Bulk meter deficiencies
Budget constrains
Lack of routine maintenance

17. ADVANCED PRESSURE MANAGEMENT
WAY FORWARD
ADVANCED PRESSURE MANAGEMENT
Evaluate existing controllers.
Recommend action: Re-set, service or replace controllers.
Selection of appropriate pressure management technique-time based or flow modulation.
Maintaining Advanced Pressure Management zones
Ensuring priority PRVs are operational and set optimally.
Evaluate where new controllers can be considered.

18. Thank you