Abstract: A water valve assembly including a housing, an inlet chamber defining a water inlet for receiving a flow of water into the inlet chamber and a valve for controlling the flow of water through the inlet into the inlet chamber. A mixing chamber is connected to the inlet chamber so as to receive water from the inlet chamber, the mixing chamber defining a supplementary water inlet for receiving a supplementary flow of water and defining a mixed water outlet from which a mixture of water from the inlet chamber and the supplementary water inlet may be provided. The inlet chamber and the mixing chamber are both provided within the first housing and are arranged one within the other. A second housing may be provided with an inlet chamber, a valve for controlling flow of water into the inlet chamber and a supplementary water outlet for connection to the supplementary water inlet of the first housing.

Abstract: A mixing valve apparatus including a mixing valve for mixing water from a cold water inlet and a hot water inlet and supplying the mixed water to a water outlet, the water inlets and outlets being for connection to an external water system, a valve servo for moving the position of the valve, a control system for operating the valve servo and thereby controlling at least the temperature at the water outlet, wherein the control system characterises the external water system in which the mixing valve is connected and optimizes control of the valve according to the characterisation.

Abstract: A mixing valve apparatus including a mixing valve for mixing water from a cold water inlet and a hot water inlet and supplying the mixed water to a water outlet the water inlets and outlets being for connection to an external water system, a valve servo for moving the position of the valve, a control system for operating the valve servo and thereby controlling at least the temperature at the water outlet, wherein the control system characterises the external water system in which the mixing valve is connected and optimizes control of the valve according to the characterisation.

Abstract: A template 20 with which pipework may be correctly positioned in a wall for connection to a wall mounted unit, the template comprising first apertures 24 for guiding drills at desired positions of pipes in the wall, and second apertures 22 for screwing the template to a wall, wherein the second apertures 22 are spaced and dimensioned such that the wall mounted unit may be mounted on the wall using the screw holes created by the second apertures 22 and be correctly aligned with pipework positioned according to the first apertures 24, each of the first apertures 24 may comprise a centrally mounted annular member 28 defining an aperture through which a center hole may be drilled.

Abstract: A device for producing a stream of aerated water, the device having a first opening for producing a first jet of water and a second opening for producing a second jet of water directed into the first jet of water so as to form a single turbulent stream of water in which air is entrained. The device being constructed by forming two relatively angled surfaces on at least one component, the surfaces having respective aligned grooves, forming two oppositely angled surfaces on at least one other component and mounting the two relatively angled surfaces against the two oppositely angled surfaces such that the grooves, together with the oppositely angled surfaces define passages for the formation of jets of water.