| 摘要 |
A draining apparatus for use in discharging water from a cistern which is arranged for dual flush operation. The apparatus includes an inlet member (2), buoyancy altering means connected to the inlet member and an outlet (4) fluidly connected to an inlet of the inlet member by an adjustable conduit (5). The buoyancy altering means is operable to decrease the buoyancy of the inlet member thereby submerging, in use, at least a portion of the inlet and discharging water from the cistern. In one embodiment, the buoyancy altering means includes a buoyancy member (3) releasably latched to the inlet member for movement therewith. In another embodiment, the buoyancy altering means includes a buoyancy chamber with a valve operable to selectively release or retain air within the chamber. In a yet further embodiment, the buoyancy altering means includes flow altering vanes at or adjacent the inlet arranged to alter, in use, the direction and/or flow rate of the water passing through the inlet thereby to reduce the effective buoyancy of the inlet member.
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