Abstract: A fluid-supply valve comprises a fluid inlet passage; an intermediate fluid chamber of greater volume than this passage; an fluid outlet from the chamber; and a device for closing off the inlet passage which is selectively adaptable to operate in one of two modes, namely, a first mode in which the inlet is closed off by virtue of the fluid pressure of the supply system acting against the device and a second mode in which the the inlet is opened for the passage of fluid sequentially therethrough and through the intermediate chamber and the fluid outlet by virtue of user pressure exerted via the device and against the fluid pressure. The valve may be incorporated in a public drinking fountain in which the user activated mechanism is remote from and sealed from the passages through which the fluid flows.