Central computer unit for setting up a water management system and control for water-saving drinking water hygiene. Access via PC, mobile device via web app or building management system. • Networking of up to 64 participants (e.g. fittings) via cable or radio (meshwork). • Participants can be individually parameterised centrally. • Centrally controlled stagnation flush (simultaneous). - At fixed intervals and on fixed dates. - When a temperature is exceeded/fallen below. - Triggered by an external signal (BMS, switch, etc.).