our Yokohama apartment had a rather tiny water closet equipped with one of these efficient contraptions. The water you used in the sink to wash your hands collected in the tank (cistern ...

integrated into the toilet. Here's the way it works. After you do your business, you use the sink to wash your hands. The sink uses fresh water, but that water is then stored in the tank as grey ...

Reader Erin from Baltimore wrote in wondering why the water in her toilet ... stack,” allows sewage gases to vent outside instead of through the toilet, sink or tub—which would make the ...