An indoor greywater recycling system to flush the toilets in a hotel is described. The system is based on filtration, sedimentation and disinfection treatments using hypochlorite as the disinfecting agent. An average amount of water of 5.2 m(3)/d(-1) was re-used, which represents 23% of the total water consumption of the hotel. A moderate hypochlorite, dose (75 mg chlorine l(-1)) and a controlled residence time (<48 h) led to a residual chlorine concentration at cistern toilets higher than l mg l(-1). Under such conditions, all samples were negative for total coliform bacteria. A maintenance program was proposed and an economics assessment was also reported. Customer acceptance was clearly satisfactory. This is the first paper reporting data on greywater reuse for toilet flushing in a hotel.