Abstract: Apparatus and methods for providing at least one chemical composition useful to treat, e.g., clean, acidify, sanitize and the like, one or more pieces of equipment are provided. The present apparatus comprise a reservoir, at least one concentrate pump, a flow assembly and a control assembly. The concentrate pump or pumps are adapted to pump, at a controlled, preferably substantially continuously controlled, time rate and at a controlled time the concentrated form of a chemical composition from an associated reservoir. An important feature of the apparatus is the ability of the control assembly to, automatically and independently of the diluent (water) flow, control the time rate at which the concentrated form of the chemical composition exits the reservoir.