Flush water volume regulator, flush water tank apparatus comprising said flush water volume regulator, and flush toilet comprising said flush water tank
A flush water volume regulator is provided, capable of canceling the buoyancy force acting on a water reservoir, wherein flush water in the water reservoir can be circulated with flush water in a flush water tank outside the water reservoir. The flush water volume regulator of the present invention has a water reservoir capable of holding a predetermined amount of flush water, having a water reservoir in which an opening is formed through which flush water inside water reservoir and flush water outside water reservoir can flow, and a float prevention means for causing a force to act on water reservoir in the opposite direction to the buoyancy force produced by flush water on water reservoir in flush water tank when water supply apparatus is supplying water into flush water tank.
