The Department of Water and Sanitation will conduct zero pressure tests on the main water supply to Gugulethu and Nyanga on Tuesday March 30.
The work will result in the disruption of the water supply from 10am to 4pm on the day.
Residents are advised to store water in clean, sealed containers for use during this period and to ensure that their taps are closed to avoid water loss and/or damage when the supply is restored.