The invention relates to a flushing device (5) for a toilet bowl (3), provided with a reservoir (7) able to contain water intended to be discharged at least partly towards the bowl (3). ) as flush, characterized in that it comprises a rotary container rotatably mounted in the reservoir (7) and capable of being filled with at least a predetermined amount of water, in the off position, and being turned into service by operating means (17) for discharging water into the tank as a flush for the bowl (3).
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