A fluid control system that includes a fluid manifold having a plurality of manifold bodies fastened to each other end-to-end so as to form at least first and second passages extending continuously through the manifold and each of the bodies. A plurality of solenoid valves are each mounted on a side of an associated body with valve ports opening into the body to the fluid passage(s) that extend through the manifold. An electrical connection arrangement is mounted at one end of the manifold for receiving control signals from an external source. A plurality of circuitboards are disposed one within the second passage of each body, with each of the circuitboards including male and female connectors at opposed ends for connecting the circuitboards in series with each other to the electrical connection arrangement at the end of the manifold. A third connector on each circuitboard extends laterally from the circuitboard for connection to the solenoid valve mounted on the side of the associated manifold body.