<p>The invention concerns a pressure-assisted cistern valve (10) of the type that includes a replenishing water inlet (12) and a cistern outlet (56) and a diaphragm (30). The diaphragm separates a first pressure space (72) which is exposed in use to replenishing water supplied to the inlet from a second pressure space (70). The diaphragm is arranged to be biased by the pressure of the replenishing water to an open position in which it allows the replenishing water to flow to the cistern outlet. There is a bleed orifice (36) to convey bleed water through the diaphragm from the first pressure space to the second pressure space. Advantageously the bleed orifice is formed in the tip of a hollow projection carried centrally by the diaphragm and communicating with the first pressure space. A further advantage is that there is no pin or the like in the bleed orifice.</p>
