These industrial self-priming pumps are constructed of rugged class 30 case iron and designed for the most demanding applications. The dynamic flow relationship between the volute and the 5- vane type impeller provides the high volumetric and hydraulic efficiencies unattainable with other self-priming pump designs. 3", 4" and 6" pumps exhibit minimal wear in a wide variety of industrial applications, adding to overall product reliability and everyday savings on operation. These dependable industrial pumps offer capacities to 1875 GPM and heads to 156 ft.