Professional Contractors 1/2 HP Cast Iron Sump Pump series with rugged epoxy coated cast-iron motor housing with high efficient, oil filled motor for enhanced heat dissipation. 2-Pole float operation switch for reliable operation and long life. 1-1/2" Discharge with a no clogging vortex impeller that will pump up to 1/2" Solids. Not intended for pumping unprocessed household sewage or as a sewage Ejector pump. Pumps 4320 gph at a 5' Lift.