Please explain what is going on with the water pipes in Kleinmond. First it was because of the fire, and now the valves need to be adjusted. What’s going on?
Municipal Manager, Dean O’Neill answers:
Cause of the disruption of water supply: The excessive pipe bursts were caused by excessive water use during the Arabella fire (Highland fires) which basically drained the network when the 17 000l firefighting tankers continually withdrew water from the network.
This caused that the pressure reducing valves (PRV’s) in the area were unable the stabilise pressures in the network.
Although the PRV’s were reset to pressures before the fire incident, the network could not be stabilised. Various cut-off valves and PRV’s in the vicinity were inspected and tested and during one of the inspections, a leaking valve was identified upstream of the PRV which caused the PRV to malfunction and raise pressures in the network.
Interim measures in place to minimise the impact of disruption of water supply
Additional valves have been installed to ensure that smaller areas in the network are not affected during pipe bursts. Two cut-off valves have been replaced in the PRV zone to render the much more effective process of pressure management by the PRV’s. This was all done in the last three weeks.
Time frame for resolving the problem?
There have been no burst water pipes in the Honingklip area since completing the work last Tuesday and we are confident that the matter has been resolved. The pressures in the network are now within the same range as before the fire.