Johnson Pump Ultima Combo Automatic Bilge Pump 1250GPH The Johnson Pump Ultima Combo is an automatic submersible 1250 Gallons per Hour Bilge Pump. Using the patented Mirus field effect detector cells produces micro-electrical fields that detect disruptions caused by water or fluids. Completely sealed the detector cells will never contact water nor corrode. The compact design has an all in one motor and impeller unit with stainless steel SS2343 shaft. The water cooled motor provides energy effici