Vertical multi-impeller centrifugal pumps in AISI 304 stainless steel with coupling, designed for pressurization activities, water circulation in heating and conditioning systems in civil and commercial building service, in agriculture and in irrigation systems and in washing systems. The pump body and the upper flange are in cataphorized cast iron, the impellers, the diffusers and the pump jacket are in AISI 304 stainless steel (on request in AISI 316 stainless steel -version X-). The pumps are particularly versatile thanks to the spacing of the in-line ports designed to maximize interchangeability. Mechanical seal with silicon-graphite carbide cartridge that can be disassembled without removing the motor, starting from 5,5 kW models. Mechanical seals for aggressive liquids are available on request. Connections: round flanges in cast iron or in AISI 316. All models in AISI 316 stainless steel - version X - are certified for use with drinking water (WRAS and ACS certifications). The pump is coupled by means of a removable rigid joint to a high energy efficiency IE3 electric motors.