A cistern comprises an upper water tank as a first chamber, and a lower water tank as a second chamber connected by an opening. At the top of the upper tank a mains water inlet allows mains water into the tank through an inlet valve, which is under the control of an upper float. An auxiliary water inlet allows water from an auxiliary supply, such as condensate from an air-conditioning unit, into the tank. At the bottom of lower tank is an water outlet, which allows flushing water from the lower tank 104 to flush an appliance (not shown) under the control of an outlet valve. The outlet valve is under the control of an actuator, which is configured to move up and down, and is also under the control of a lower float.

Problem: To provide a discharge valve apparatus able to be disposed on a flush toilet with a relatively low silhouette by shortening the length of the valve body main shaft and lowering the height of the discharge valve apparatus. Solution Means: A discharge valve apparatus having: a small-flush float mechanism and a large-flush float mechanism; wherein the valve body main shaft includes a single shared projecting portion which locks to the large-flush cam lock portion when the required amount of pull-up for the large-flush mode has been pulled up, and locks to the small-flush cam lock portion when the amount of pull-up required for the small-flush mode has been pulled up.

Problem: To provide a discharge valve apparatus able to be disposed on a flush toilet with a relatively low silhouette by shortening the length of the valve body main shaft and lowering the height of the discharge valve apparatus. Solution Means: A discharge valve apparatus having: a small-flush float mechanism and a large-flush float mechanism; wherein the valve body main shaft includes a single shared projecting portion which locks to the large-flush cam lock portion when the required amount of pull-up for the large-flush mode has been pulled up, and locks to the small-flush cam lock portion when the amount of pull-up required for the small-flush mode has been pulled up.

A flush water tank assembly includes: a flush water supply device for switching between a water supplying state and a water stopping state with respect of an inside of the water storage tank in terms of flush water; a small tank attached to the flush water supply device and configured to hold therein flush water; an openable and closable valve for opening and closing an opening in the bottom wall of the small tank; a float movable upwardly and downwardly according to change in water level within the small tank; and a water discharge valve device for opening and closing a water discharge port of the water storage tank, and the openable and closable valve has an auxiliary float element configured to be moved upwardly and downwardly according to change in water level within the small tank.

A flush water tank assembly includes: a flush water supply device for switching between a water supplying state and a water stopping state with respect of an inside of the water storage tank in terms of flush water; a small tank attached to the flush water supply device and configured to hold therein flush water; an openable and closable valve for opening and closing an opening in the bottom wall of the small tank; a float movable upwardly and downwardly according to change in water level within the small tank; and a water discharge valve device for opening and closing a water discharge port of the water storage tank, and the openable and closable valve has an auxiliary float element configured to be moved upwardly and downwardly according to change in water level within the small tank.

The present invention relates to a water disposable system comprised of a connecting member having first side connected to at least one unwanted water source and one valve to control the flow of an unwanted water. A toilet water tank is connected a second side of the connecting member, wherein the water tank comprises: a strainer in a stand pipe; a two float system, wherein a first float is set at a minimum tank volume water line, and a second float set at maximum tank volume water line. A button is coupled with a second float allowing the intake of the fresh water from the fresh water pipe upon actuation. A transparent window or gauge is positioned on the front wall of the tank for determining the volume of water in the toilet tank.

The present invention relates to a water disposable system comprised of a connecting member having first side connected to at least one unwanted water source and one valve to control the flow of an unwanted water. A toilet water tank is connected a second side of the connecting member, wherein the water tank comprises: a strainer in a stand pipe; a two float system, wherein a first float is set at a minimum tank volume water line, and a second float set at maximum tank volume water line. A button is coupled with a second float allowing the intake of the fresh water from the fresh water pipe upon actuation. A transparent window or gauge is positioned on the front wall of the tank for determining the volume of water in the toilet tank.

A system for flushing a toilet having a pump in fluid communication with a floatable, adjustably buoyant container by being connected with a tube to such floatable, adjustably buoyant container. The floatable, adjustably buoyant container is located inside the water tank of a toilet having a flapper covering the discharge hole in the tank of the toilet and is attached to such flapper. The pump provides a fluid less dense than water to the floatable, adjustably buoyant container and thereby raise the flapper and allow water to proceed through the discharge hole. When the fluid is allowed to leave the floatable, adjustably buoyant container, the flapper is lowered and again seals the discharge hole. An optional embodiment withdraws fluid from a normally inflated resilient container seated within the discharge hole to diminish the size of such normally inflated resilient container and thereby permit water to flow through the discharge hole.

A system for flushing a toilet having a pump in fluid communication with a floatable, adjustably buoyant container by being connected with a tube to such floatable, adjustably buoyant container. The floatable, adjustably buoyant container is located inside the water tank of a toilet having a flapper covering the discharge hole in the tank of the toilet and is attached to such flapper. The pump provides a fluid less dense than water to the floatable, adjustably buoyant container and thereby raise the flapper and allow water to proceed through the discharge hole. When the fluid is allowed to leave the floatable, adjustably buoyant container, the flapper is lowered and again seals the discharge hole. An optional embodiment withdraws fluid from a normally inflated resilient container seated within the discharge hole to diminish the size of such normally inflated resilient container and thereby permit water to flow through the discharge hole.

A leak-proof water valve includes a water inner tube, an outer tube group and a buoyant housing. When the sealing plug of the toilet tank is leaking, leak-proof structure of a buoyant housing for automatically detection is provided to stop the water inlet valve supplying water, so that a user could be aware of the leaking situation to thereby avoid the waste of water resources.