Superior Pump 93501 1/2 HP Cast Iron Sewage Pump with Tethered Float Switch Moves up to 4800 gallons per hour, max head 25feet Rugged cast iron constructions Tethered float switch to automatically turn the pump on/off 2-inch NPT discharge, will handle up to 2-inch solids and features a non-clogging vortex impeller Superior Pumps are Built to Last, engineered with quality components and are 100 percent factory tested.