1/2 HP 120 GPM Energy Saver Submersible Sewage Pump with Piggyback Diaphragm Switch The ES50 model pumps from Little Giant are energy-saving, high performance, fully submersible sewage/effluent/high-capacity sump pumps, designed for the professional plumbing contractor. The ES Series Pumps draw less energy while delivering greater pump flow and overall performance. 1/2 HP permanent spilt capacitor motor with energy-saving low amp draw Designed for continuous duty Epoxy coated cast iron housing 2" FNPT (51 mm) discharge Carbon/ceramic shaft seal Upper and lower ball bearings Vortex engineered composite impeller Thermal overload protection Piggyback Diaphragm Switch Float On Level: 15.5" 14.5" Float Off Level: 5.5" 4.5" cCSAus listed
So I think the Little Giant 511560 1/2 HP 120 GPM Energy Saver Submersible Sewage Pump with Pig Steel Pumps Sewage Pumps was okey, but it's not as impressive as I hooped. Price can be lower too.