| 摘要 |
A controllable siphon pipe WC flushing system, which is an application of a foot-valve-less WC flush based on a siphon. The device comprises a compressible siphon pipe 1 with its waste pipes 4, a siphon vessel 2 which is provided with air holes 7 and which is floatable and has been placed loose on top of the open upper part of the siphon pipe, and a partially rotatable casing 3 around the siphon vessel, on which casing the drive arm of the device, with its flush handle 5, has been mounted. The variously long waste pipes which constitute an extension to the siphon pipe cause a flushing vortex in the bowl. The siphon vessel lying by means of rods on the siphon pipe starts to float if the water level rises due to an intake valve leak, whereupon a symbol 6 in the drive arm reveals the leak. Rotation of the casing in the siphon vessel enables the air holes in the siphon vessel to be opened, by means of which holes flushing can be discontinued. <IMAGE>
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