Zoeller 0.5-HP 60gPM cast Iron Submersible Sump Pump (1075-0001)Zoeller cast Iron Sump Pump, non-clogging vortex impeller. This pump features a premium electromagnetic float switch for reliable water removal and long life. 1-12 In. NPT discharge - passes 38 In. solids. All stainless steel hardware. Vertical switch easily fits into as small as a 10 ..