They work just like a regular one with two exceptions. The water from the fill valve is split into two sreams. One refills the tank and the other flushes the perimeter of the the bowl. Also, since the operating water level is lower than the seat level of the bowl, If the bowl becomes obstructed the water cannot overflow the bowl onto the floor.: I would like to find out how these toilets work. If : someone would either explain or direct me to a site : that does, I would be most grateful.