Water works in Zwaanswyk By Staff Reporter - September 21, 2022 Share on Facebook Tweet on Twitter The City’s water and sanitation department will be conducting zero pressure tests on the main water supply to the Zwaanswyk area in Tokai. This work will result in the disruption of water supply to this area on Wednesday September 21, from 10pm until 3am on Thursday September 22. Zero-pressure testing is part of the installation process for pressure management technology. Tests are done to see if there are any unmapped inflows that need to be taken into account before smart pressure reducing valves are installed. 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.