An overflow system is described for a water receptacle (22) such as bathtub, sink or washbasin having a water tap for connection to a water supply. The system includes sensing means, such as a float (14), for sensing an overflow condition of the receptacle, and a supply valve (65) responsive to the sensing means and arranged to close the water supply to the tap. The supply valve may be hydraulically controllable via a control port (68) thereof. A control valve (59) is provided between the water ...

An overflow device for a bathtub with an overflow inlet arranged for mounting in a conventional overflow hole of the bathtub and a valve connected between a water supply and a conventional bath tap. A spring can be used to change the valve from its open state to its closed state. A float and trigger lever can detect water that has entered the overflow inlet and trigger the device to change, using the stored spring energy, from a set state in which the valve is open to a triggered state in which ...