A sprayer with a water purifier, a valve system, and a selector switch for the same are disclosed. In one non-limiting embodiment, when the sprayer is in use, the sprayer includes a purifier for purifying water. The sprayer may be compact and ergonomic. The sprayer may include a valve system that provides a selection of water flow paths and/or nozzles or other output mechanisms for the sprayer, and a selector switch for controlling the valve system. In certain embodiments, the sprayer is provided with a multiple position selector switch that can be controlled by one of the operator's fingers, or by the operator's thumb so that the operator can use the sprayer and select the sprayer setting with one hand.