Liberty Pumps 237 1/3-Horse Power 1-1/2-Inch Discharge 230-Series Automatic Submersible Sump Pump with VMF Switch 3/8-Inch solids handling Pumps up to 37 GPM with a discharge head of 5-Foot Maximum discharge head of 21-Foot 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