Abstract: An adaptor for a water delivery device to reduce water wastage, wherein movement of a plunger over a first part of its stroke is controlled by an air flow control valve to provide a predetermined volume of water and movement over a second part of the stroke is substantially instantaneous such that water is not supplied for a significant length of time at a water flow rate that is not useful.

Abstract: A tap adapter comprises a tap head, a tap body and a plunger. The plunger is mounted within the body so as to be movable from a closed position to both a first open position and a second open position. Resilient means are arranged to return the plunger from either open position to said closed position. The adapter is arranged such that the return to the closed position from said first and second open positions takes different lengths of time.

Abstract: An adaptor for a water delivery device to avoid water wastage by the provision of two durations of water flow, comprising a tap head, a tap body and a plunger, the plunger being slidably mounted within the body so as to be movable from a closed position to both a first open position and a second open position; resilient means being arranged to return the plunger from either open position to said closed position, the adapter being arranged such that the return to the closed position from said first and second open positions takes different lengths of time, and adjustment means arranged to adjust the ratio between the length of time for the plunger to return to the closed position from the first open position and the length of time for the plunger to return to the closed position from the second open position.