ECO-FLO Products EFSUB7-123 Submersible Deep Water Well Pump, 3 Wire, 230v, 4 Inch, 3/4 HP, 12 GPM Corrosion resistant all stainless steel exterior construction With 3-wire models, all controls are in the control box, mounted at the top of the well Contains many stainless steel and corrosion-resistant components 3/4 Horse Power motor - cast iron discharge connection; Built-in check valve Download the User Manual under the Technical Specification section of this page for safety, installation, troubleshooting, and warranty information