A joint connects to a hot water source, a toilet tank of a toilet, and a hot water outlet. A set of pipes connecting the hot water source and the joint may be referred to herein as “main hot water pipes.” Water exiting the hot water source into the main hot water pipes is above a desired water temperature. As time passes, however, water that rests in the main hot water pipes may fall below the desired water temperature. Rather than wasting all of the cooled water resting in the main hot water pipes in order to use hot water at the hot water outlet, at least a portion of the cooled water may be used to refill the toilet tank. Therefore less cooled water exits the hot water outlet before fresh water reaches the hot water outlet.

The system includes a fluid valve with a modular and/or replaceable fluid control assembly that requires maintenance over a product life of the fluid valve. The modular and/or replaceable fluid control assembly includes at least one portion including a setting or presetting configured and arranged to control fluid flow behavior in the fluid valve. The setting or presetting is useable to control fluid flow in the modular and/or replaceable fluid control assembly after an upgrade or replacement of at least a portion of the modular and/or replaceable fluid control assembly. Further, the setting or presetting enables the modular and/or replaceable fluid control assembly to retain the fluid flow behavior following one or more upgrades or replacements of one or more portions of the modular and/or replaceable fluid control assembly.

Proactive methods and articles of manufacture are disclosed for preventing any water leak or flooding of a toilet. These methods and systems can replace or be added to the water system of existing toilets, especially the North American toilets, which use water tanks. In various embodiments the water is turned OFF and prevented to enter the toilet tank before the flush handle is activated and/or before a user is sensed. In some embodiments each flushing of the toilet permits the toilet tank to only fill once. If a leak causes the tank to empty, water is not permitted to fill the leaking tank until the next time the flush handle is activated. In some other embodiments each flushing of the toilet and/or sensing of a user permits the toilet tank to fill a predetermined number of times.

Proactive methods and articles of manufacture are disclosed for preventing any water leak or flooding of a toilet. These methods and systems can replace or be added to the water system of existing toilets, especially the North American toilets, which use water tanks. In various embodiments the water is turned OFF and prevented to enter the toilet tank before the flush handle is activated and/or before a user is sensed. In some embodiments each flushing of the toilet permits the toilet tank to only fill once. If a leak causes the tank to empty, water is not permitted to fill the leaking tank until the next time the flush handle is activated. In some other embodiments each flushing of the toilet and/or sensing of a user permits the toilet tank to fill a predetermined number of times.

A ceramic toilet pan having a raised rear portion to which a hinge tube may be accurately located and fixed in position for example by adhesive using a jig despite variations in pan body size due to ceramic firing, a water pump and air pump being provided for flushing the toilet pan when a seat and lid are in a closed position. The seat and lid are rotationally mounted to the pan by a horizontal hinge pin located in the hinge tube and a latch member is provided for latching the lid and seat closed. A cistern is also provided having an overflow weir.

A ceramic toilet pan having a raised rear portion to which a hinge tube may be accurately located and fixed in position for example by adhesive using a jig despite variations in pan body size due to ceramic firing, a water pump and air pump being provided for flushing the toilet pan when a seat and lid are in a closed position. The seat and lid are rotationally mounted to the pan by a horizontal hinge pin located in the hinge tube and a latch member is provided for latching the lid and seat closed. A cistern is also provided having an overflow weir.

The invention relates to a dual-discharge tank for toilets, including a tank, a water inlet having controlling means which are activated depending on the volume of water contained in the tank, a discharge mechanism coupled to a drainage collector, and means for actuating the discharge mechanism. The tank also includes an additional water inlet connected to a timed valve for controlling water flow, which automatically cuts off the flow of water through said inlet after a predetermined time has elapsed since the actuation thereof. The outlet of the timed valve for controlling water flow is connected to a first pipe that directs the additional water toward the drainage collector.

A delayed shutoff device comprises a conduit configured to allow a fluid to flow through, wherein the conduit includes a conduit start and a conduit end. The device further comprises a plug configured to be placed inside the conduit at the conduit start; move inside the conduit from the conduit start toward the conduit end when the fluid flows through the conduit; and reduce the fluid flow upon reaching the conduit end. The device is configured to allow a pass-through quantity of the fluid to pass through the conduit while the plug moves from the conduit start to the conduit end. The conduit end may form a seat, the plug being configured to stop moving upon reaching the seat. The plug may be configured to fit the seat imperfectly, to allow a seepage of the fluid after reaching the seat.

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.