Abstract: A command device for a water supply plumbing fixture that extends along a main axis and has a base group fluidically connectable to at least one inlet line and to supply lines, and an activation and regulation group engaged with the base group is provided. The activation and regulation group has a plurality of activation members configurable in an active configuration and a passive configuration in which the activation members respectively allow or prevent passage of water to a respective supply line, and a regulation member having an annular adjustment crown angularly rotatable, the activation members being housed at least in part within the adjustment crown, and a valve element, housed at least in part inside the adjustment crown, engaged with the base group and with the adjustment crown, so that each angular position of the adjustment crown corresponds to a respective configuration of the valve element.