A vertical centrifugal pump comprises a housing, impeller, annular guiding vanes, annular outlet with outer and inner casings, forming a collector with a pressure pipe, and flow channels to lower and upper rims. Channels to the lower rim pass through the center of the pump axis. Blades direct flow between pipes into the pressure pipe. Pipes are connected with the lower rim through the lower confuser with flat radial ribs, positioned with the inner part of the confuser from the pipes and the outer part from the inner casing to the lower rim. An annular baffle is implemented between the housing and outer casing, dividing the inlet to the rims. Channels to the upper rim are created between the two annular elements, connected by radial outer ribs with a thickened, streamlined form and mated with flat inner ribs, merged in the upper confuser similarly to the lower confuser.