The pressure booster system operates automatically, controlled by means of pressure and flow controllers. Start and stop functions of the pump are controlled by the actual water withdrawal. A low-on water protection is integrated. The info display and a voltage-free fault signal output provide information on the operating status. Normal-priming, multistage horizontal centrifugal pump(s) is/are mounted on an aluminium frame equipped with, among other things, pump control, pressure gauge, non-return valves, as well as shut-off valves.