Abstract: A toilet-flushing (1) device comprises a container (2) divided by an elastic diaphragm (3) with a direct unrestricted connection to a water supply under pressure at the lower part of the container (2), with a flushing valve (15) also in the lower part of the container. The water distends the diaphragm (3) so that when the flushing valve (15) is opened, the diaphragm (3) ejects the flushing water fast, allowing a small volume flush to effectively clear the toilet trap (2) and sewer. Extension of the diaphragm can be reduced by having two diaphragms (55), (56), each providing half the flush volume by their extension. Substantial water saving is enabled. A water pressure actuated valve (35) that is well adapted for application to this device is disclosed.

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 siphon flush mechanism is provided for a conventional commode water storage tank in which a siphon metering valve is utilized to control the level of water contained within the flush mechanism. An arcuate flexible connector tube is lifted by the action of an external handle thereby providing fluid communication between two inverted U-shaped traps in the flush mechanism to actuate the flushing cycle.

Abstract: A toilet flushing apparatus characterized by an inherently leakproof syphon, a manually discharged primer tank initiating syphoning through a discharge tube and toilet flush tube, and with a floating flush valve and control for complete discharge of primer water followed by immediate closure to ensure continued syphoning, the primer tank being automatically refilled with the rise of float controlled supply tank water.