1. A selector valve assembly comprising:a valve including a product passageway;
a plurality of inlets, at least two of the plurality of inlets circumferentially arranged on the valve and disposed on a radial exterior of the valve, and the plurality of inlets configured to be fluidly coupled to different sources of chemical concentrate; and
one of two outlet passages in fluid communication with the product passageway;
wherein rotation of the valve is configured to fluidly align the product passageway with a selected inlet of the plurality of inlets to direct chemical concentrate from one of the sources of chemical concentrate through one of the two outlet passages.