Multi-impeller vertical centrifugal pumps with coupling with MCE-P variable frequency drive designed for pressurization in commercial building service; they can also be used in agriculture and in watering systems. They are particularly versatile, thanks to the use of the MCE-P variable frequency drive, which ensures performance levels capable of automatically adapting to the different needs of the system, keeping a constant pressure. Pressure sensor supplied as standard. Pump body and upper flange in cataphoretic paint coated cast iron; impellers, diffusers and pump liner made of AISI 304 stainless steel (AISI 316 stainless steel available on request - X version). Versatility, thanks to the center distance between the two in-line ports, designed to maximize interchangeability. Starting from 5,5 kW models, the silicon carbide-graphite mechanical seal can be removed without removing the motor. Mechanical seals for aggressive liquids and different connections also available (round, oval, Victaulic, clamp flanges). All the AISI 316 stainless steel - X version - models are certified for use with drinking water (WRAS and ACS certifications). Pumps coupled by rigid coupling to IE3 high energy efficiency electric motors. Possibility of remote control with DConnect with DConnect Box supplied separately.