Vertical, multistage centrifugal pump with inlet and outlet ports on same the level inline. The pump head and base are in cast iron. All other wetted parts are in stainless steel. A cartridge shaft seal ensures high reliability, safe handling, and easy access and service. Power transmission is via a rigid split coupling. Pipe connection is via oval flanges with internal NPT threads. The pump is fitted with a 1-phase, fan-cooled asynchronous motor.