Abstract: A switching device for rim water in a low tank toilet, in which toilet water in a toilet tank is drawn and supplied to the rim of a toilet bowl by the pressure of water that is supplied from a filler valve to the rim through a water supply tube and a supply water switching unit is rotated according to a reduction in the water level of the toilet tank, so that the water supplied from the filler valve is charged into the toilet tank and, at the same time, some water supplied from the filler valve is supplied to the rim through a fill-up water inlet hole.

Abstract: An apparatus for preventing backflow of a fill valve in a water toilet. The apparatus includes a fill valve for permitting and stopping supply of washing water from a hydrant into a water tank, a fixing section fixing the fill valve to an overflow pipe, a float having a packing for opening or closing an opening/closing hole of the fill valve depending on a level of water contained in the water tank, and a backflow-preventing section disposed inside the fill valve. The backflow-preventing section permits washing water to be supplied from the hydrant into the water tank, and prevents washing water from flowing back toward the hydrant. The backflow-preventing section includes a backflow-preventing member mounted to a supply pipe of the fill valve, and an operation control valve seated on a fitting protrusion of the fill valve to control an operation of the backflow-preventing member.

Abstract: An apparatus for preventing backflow of a fill valve in a water toilet. The apparatus includes a fill valve for permitting and stopping supply of washing water from a hydrant into a water tank, a fixing section fixing the fill valve to an overflow pipe, a float having a packing for opening or closing an opening/closing hole of the fill valve depending on a level of water contained in the water tank, and a backflow-preventing section disposed inside the fill valve. The backflow-preventing section permits washing water to be supplied from the hydrant into the water tank, and prevents washing water from flowing back toward the hydrant. The backflow-preventing section includes a backflow-preventing member mounted to a supply pipe of the fill valve, and an operation control valve seated on a fitting protrusion of the fill valve to control an operation of the backflow-preventing member.

Abstract: A valve for controlling the amount of water in a rim-side supply pipe of a fill valve in a water toilet. The valve includes a fill valve for permitting and stopping supply of washing water from a hydrant into a water tank. A fixing section fixes the fill valve to an overflow pipe. A float has a packing for opening or closing an opening/closing hole of the fill valve depending on a level of water contained in the water tank. A water amount control valve controls the amount of washing water which is supplied to the rim-side supply pipe of the fill valve. The amount of washing water, which is supplied toward a rim of the toilet, is controlled by the opened area of the rim-side supply pipe of the fill valve.