The new thermoplastic centrifugal pump handles flows to 1200 gpm at heads to 200 ft. All wetted components are molded of solid Polypropylene, PVDF or CPVC to eliminate chemical attack associated with pumping of process fluids, plant effluents and industrial/municipal water and waste streams, while minimizing abrasion. Since all wetted surfaces are chemically inert, the pumps are also rated for handling reagent grade chemicals, high purity water and other fluids that must remain contamination free. The alloy shaft, which is isolated from fluid contact by a thick-sectioned thermoplastic sleeve, transfers torque from a 125 hp motor and can employ a balanced 14-inch diameter impeller. The pumps are in wide use for effluent collection and evacuation, and for transfer and circulation of chemicals or waste resulting in minimized maintenance costs and maximized MTBR. The thermoplastic pumps weigh significantly less than pumps of equivalent capacity constructed of stainless steel, Hastelloy, Monel or other metal alloys, facilitating installation and ease of maintenance, according to the manufacturer.