This thesis proposes a redesign of the OptimFlush water-saving toilet. The aim is to create a product that is attractive for the Dutch residential market, particularly for use in existing homes, while maintaining the water-saving functionality of the OptimFlush system. In light of increasing water scarcity, the goal is to reduce drinking water consumption.
The project starts with comprehensive research into the current product, the sanitary market, different stakeholders and sustainability. Several key insights emerged, the most important being that the toilet should be a wall-hung version. Consumers perceive this type of toilet as more hygienic and modern, and it also solves a common issue with floor-mounted toilets for installers related to mismatched drainage pipe heights.
Based on these findings, three design concepts were developed. The most promising concept involved integrating the OptimFlush system into the wall. This configuration provides greater design freedom and future-proofs the system, allowing other bowl designs to be connected later. The concept was validated through user testing, cleaning tests, FEA simulations and consultation with an installer.
The final design is a wall-mounted toilet with the OptimFlush system built into a frame behind a false wall. A distinctive wave pattern on the toilet lid makes the product recognisable, while the visible logo builds trust with installers.
The redesigned system features a modern and distinctive look that sets it apart from other toilets. The toilet achieves at least 50% water savings, benefiting both the environment and consumers, especially in times of rising water prices.
The thesis concludes with recommendations to communicate the benefits of the toilet to consumers, including potential water savings. It also advises on technical improvements, such as rotating the two outlet hoses to one side to prevent them from protruding from the frame.
