Siphon assemblies

A kit for providing a siphon assembly for a flushing cistern, said kit comprising:

• 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;
• 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;
• and
• a first and second closure element each capable of being secured in a predetermined position 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 with the first closure element in the predetermined position,
• the second closure element being shaped so that the second closure element defines at least a second predetermined flush level lower than top edge of the venting aperture with the second closure element in the predetermined position,
• the first predetermined flush level being different from the second predetermined flush level.

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 securable consistently in a predetermined position in engagement with the venting aperture, the first closure element being shaped so that the first closure element defines at least a first predetermined flush level lower than a top edge of the venting aperture with the first closure element in the Predetermined position,
• wherein the venting aperture is in the form of an open ended slot,
• wherein the open end of the slot is supported by a bridging portion,
• wherein there is a locking lug on the closure element which engages the bridging portion.