Integrated pumping system for water pressurization in commercial building service. Available in two power sizes, the system is composed of modular elements that allow different configurations: single, double, triple or quadruple unit are possible, to cover the needs of medium/large condominiums and high buildings (even over 14 floors). The variable frequency drive keeps the pressure constant by varying the number of the frequency of the motor according to the request and also thanks to the water-cooled permanent magnet motor it allows greater efficiency and energy savings.