This report investigates how human factors influence the water-saving potential of washroom appliances. As part of Thames Water’s Watercycle Project, different water-efficient devices were installed in washrooms and compared to standard appliances. Also, behaviour change measures were carried out. The results show significant behavioural differences between males and females. The two novel dual flush toilets and waterless urinals were well received by users. In contrast, the infrared controlled taps were found difficult to use and least accepted by customers. Information and labelling had a positive effect on conservation and user opinions.