Centrifugal Monoblock and single-impeller electrical pump with 5.5-40 horse power motor, the pump is connected to the motor by means of a support unit. It has flanged inlet and delivery openings and threaded counter-flanges. This pump is ideal for pumping clean water and other chemically and mechanically non-aggressive liquids. Also, it is suitable for civil, agricultural, industrial or general plant uses, like water supply, spray or flowing irrigation, high pressure system, heating, conditioning and any other general service requiring transfer of clean liquids.