The SM21 is the ideal pump for areas of confined space and small openings. The SM21 pumps up to 300 gpm (1125 lpm) at a 50-foot head. The cast iron impeller is within 34 of an inch of the base allowing the pump to remove more liquids than other pumps. The SM21 features a lifting eye 2.5 in. NPTF discharge and is furnished with hose whips and flush face quick disconnect couplers.