The present invention provides a device for reducing the amount of water or other fluid discharged at a tap (19), which device comprises a body member (1, 2) having an inlet adapted to be connected to a supply of water or other fluid, an outlet through which the fluid is to be discharged to the locus, a fluid path between said inlet and said outlet and a valve mechanism located in the fluid path between said inlet and outlet for controlling the flow of fluid through the tap (19), characterised in that the device comprises: (a) a body member (1, 2) adapted to be mounted on or in the outlet to the tap in the flow path of fluid through said outlet; (b) a plurality of fluid flow bores (17, 18) extending through the body member; and (c) a pressure responsive flow regulating means for limiting the flow of fluid through at least some of said bores in response to the flow of fluid applied to said body member, the pressure responsive means comprising two transverse flow regulation members (3, 4) connected axially so that they move as a unit.