DualFlushSysteme

DualFlushSysteme is a term used to describe toilet flushing systems that offer two selectable flush volumes. The smaller flush is intended for liquid waste, while the larger flush handles solid waste. The goal is to reduce water consumption and wastewater generation by letting users choose the volume appropriate to the task. The term is widely used in German-speaking regions and in technical literature as a pluralized form.

Most DualFlushSysteme rely on either a dual-flush valve or a dual-action mechanism within the tank. Actuators may be mechanical levers, push-buttons, or electronic controls. The smaller flush typically uses about 3-4 liters, the larger 4.5-6 liters, though values vary by model and region. Some variants combine a fill-tank approach with labeled, color-coded buttons to indicate the flush volume.

Advantages include lower water use and reduced operating costs, especially in households with high toilet usage. They can also meet or exceed local efficiency standards. Potential drawbacks include higher initial cost, more complex repair, and a slightly larger footprint in the toilet tank. Maintenance should include regular inspection of seals, valves, and the flush mechanism to prevent leaks.

Adoption varies by country; many European countries promote dual-flush systems through building codes and efficiency programs. In other regions, retrofits and OEM installations are common. Consumers should verify compatibility with their toilet model and local regulations, and consider warranty coverage and service availability.