Abstract: A major water leak prevention apparatus for a water inlet valve, in which a water receptacle tray is mounted on a water inlet valve body and includes an overflow port. The water receptacle tray has a bottom in which an opening is formed. A counterweight float is mounted on the water inlet valve body and includes a water compartment and a buoyance compartment arranged at a lower end of the water inlet valve body. The bottom opening of the water receptacle tray is connected via a passageway pipe to the counterweight float. The water compartment selectively blocks a lower end opening of the passageway pipe or opens the lower end opening of the passageway pipe. This arrangement helps stop water ingress through the water inlet valve when major water leakage occurs in a water tank.

Abstract: A minor water leak prevention apparatus for a water inlet valve, in which a float is mounted on a regulation bar and received in a water container. The water container is mounted on a siphon tube. The siphon tube is formed with an air aperture. A counterweight buoyance switch is mounted on the water container. The counterweight buoyance switch has a counterweight water compartment having a lower end forming a water drain hole. The counterweight water compartment has an upper end to which a closure pressing plate is mounted. The closure pressing plate is opposite to the air aperture. The counterweight buoyance switch controls opening/closing of the air aperture. This arrangement allows water ingress through a water inlet valve to be stopped when minor water leakage occurs in a water tank.

Abstract: A siphon assembly for a flushing cistern, said assembly including an inverted generally U shaped duct having an up leg and a down leg the up leg being provided with an enlarged chamber having a lower end open to the interior of the cistern in use and the down leg forming an outlet from the cistern in use for delivery of flushing water; and a vertically displaceable piston incorporating a flexible diaphragm acting as a one way valve, said piston being movable in said chamber to initiate a siphonic flushing action operatively discharging water through said duct from the cistern; a side wall of the chamber defining a venting aperture intermediate the top of the chamber and said lower open end, the assembly further including a first closure element secured in engagement with the venting aperture, the first closure element being shaped so as to define at least a first predetermined flush level lower than a top edge of the venting aperture when so secured.

Abstract: A siphon for use with a flush type toilet having a tank with a drain hole at the bottom. The siphon comprises a vertical tubular discharge portion including a vertical tube which is secured within the drain hole in the bottom of the tank. The siphon also includes a bell shaped inlet portion including a connecting portion having a downwardly extending tubular portion for telescopic insertion into the vertical tube. A hole in defined in the bell shaped inlet portion and an elbow is secured within the hole and extends downwardly, terminating at a height selected to define the desired flush height of the toilet.

Abstract: A siphonic flush valve for a toilet having a toilet tank and toilet bowl. The valve includes a housing supportable in the toilet tank and defines a chamber, an upleg open to the chamber and a downleg open to the upleg. The chamber includes a manually actuatable piston system slideably supported therein for forcing water in the chamber into the upleg. The flush valve also includes an adjustable check valve and a vent and reseal tube.

Abstract: A water tank for a flushing system of the type having a flap valve fastened in a siphon tube and alternatively controlled by a main control knob and an auxiliary control knob to discharge different volume of water for washing a lavatory bowl, wherein rotating said main control knob causes a siphon tube to operate so as to let water be completely discharged out of the water tank; rotating said auxiliary control knob causes a float to descend with the flushing water and actuate a siphon interruption in the siphon tube so that a reduced volume of water can be discharged out of the water tank for washing a lavatory bowl.

Abstract: A syphon-operated closet bowl flush tank of the kind comprising an inverted bell (10) containing a liftable plunger disc (12) to initiate syphon action has a flush control valve (14) comprising a tubular body part (16) mounted vertically in the top (18) of the bell and extending above the bell. The valve further has a stem (20) movable in and guided by the body part, is shaped to define a flow path (22) through the body part, and has lower (24) and upper (26) portions extending respectively below and above the top of the bell. The body part has a downwardly facing valve seat (25) inside the bell and the stem has an upwardly facing valve seat (31) co-operating with the downwardly facing seat to make a valve closure. An inverted bell float (38) is provided on the top of the stem. The body part includes a spring ring (30) carried in a flange (23) of the tubular body part so that the valve can be fitted to an existing bell by access from only the top of the bell.