Myers MESPD50AH1 Cast Iron Effluent Pump 0.5 HP 115V 1PH Automatic 20' CordMyers MESPD50 Series Cast Iron Effluent Pump Description Myers MESPD50 100H Series can handle capacities up to 110 gallons per minute and heads up to 50 feet, while the MESPD100 handles capacities up to 140 gallons per minute and heads to 63 feet. These pumps feature a high quality cast iron pump volute, motor housing and seal housing construction that help to ensure a long service life. The MESPD50 100H are completely submersible, "high head", dual