Greywater (raw) Treated water Overflow to sewer
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Building Greywater Recycling Loop

Shower, sink and laundry water — greywater — makes up more than half of a typical household's indoor water use, and most of it is clean enough to reuse for toilet flushing or irrigation after simple filtration and disinfection. This simulator runs a live daily mass balance for a building-scale greywater loop: set the number of occupants, the filter train's efficiency and the storage tank's capacity, toggle which reuse points are open, and watch treated water animate from the sources through the filter into the tank and back out to reuse, with a real turbidity model and a running freshwater-savings figure.