The project involves installing a water recycling system in residential buildings. Greywater from showers, sinks and washing machines is cleaned and reused for flushing toilets and watering gardens and public spaces. Consequently, the demand for tap water can be reduced by around 50%. Heat is also recovered for use in providing hot water. This modular, replicable system has been tested in an ongoing operational setting. The project demonstrates how wastewater can be treated as a resource.