Liberty Pumps 257 1/3-Horse Power 1-1/2-Inch Discharge 250-Series Cast Iron Automatic Submersible Sump/Effluent Pump with VMF Switch Pumps up to 50 GPM Maximum discharge head of 21-Foot 1/2-Inch solids handling Efficient motor design reduces electrical usage by up to 40-percent Includes a magnetically operated VMF switch for smaller pits down to a 10-Inch diameter and a 3 year warranty