Automatic booster sets, especially suitable for domestic use, small civil, farming or industrial installations, washing plants and leisure activities. These feature the use of JET, JETINOX, JETCOM and EUROINOX self-priming pumps, coupled directly to the Active Driver device. The Active Driver is an innovative, variable speed integrated electric pump control system, able to maintain constant pressure with changing flow rates. Thanks to its simple and clear user interface, it is easy to calibrate operational pressure, view settings and any error messages. Active Driver comprises an inverter, a pressure sensor and a flow sensor.