A sealing plug of a toilet tank, which includes a cover and an installation seat, wherein two corresponding shaft columns are set on a top of the cover, two corresponding support arms are set on the installation seat, two shaft holes are respectively set on a front end of the supporting arms, the shaft columns are inserted into the shaft holes, a notch is set on a rear end of the supporting arms, the notch is provided to to set on a positioning column of a flush pipe. By the composition, a sealing plug structure is provided for fine-tuning a merged angle automatically, to thereby being covered on the drain opening with different tilt angle.

A dual valve water discharge system is a system through which the user is able to select the volume of water used when flushing liquid waste and/or solid waste. The system features a drain flap with a flow through hole that restricts the flow of water entering a tank drain. The drain flap is covered by a flow rate control flap that is lifted to expose the flow through hole. The drain flap may be lifted as well, in turn lifting the flow rate control flap and allowing unrestricted flow into the tank drain. The flush volume is selected by lifting a flush handle upward or pressing the flush handle downward. The flush handle is connected to a flush lever which is in turn connected to a first cord and a second cord that are able to lift the drain flap and the flow rate control flap.

Controls for use in association with the main tank of a toilet include a container which is disposed in the main tank and holds a body of water. A float is movable in the container to expel water from the container and effect operation of an inlet valve from a closed condition to an open condition. Water flows into an inlet compartment and into the main tank when the inlet valve is in the open condition. Water flows into an outlet compartment after a predetermined quantity of water has accumulated in the inlet compartment. Water flows from the outlet compartment into the container.

A seat waterway system includes a control mechanism configured to be disposed at one side of a seat, and the control mechanism includes a spray pipe switching valve. The seat waterway system also includes a waterway diverting valve. The waterway diverting valve includes a diverting valve housing configured to be disposed in a rear base of the seat. The waterway diverting valve also includes a rotating valve core pivotably connected to the diverting valve housing and configured to be rotated with the seat, the rotating valve core comprising one end disposed in the diverting valve housing. The waterway diverting valve also includes a diverting valve inlet end configured to be connected to one end of the diverting valve housing.