Three wire Submersible Well Pumps require a control panel for use. The 3-Wire system is easier to troubleshoot and less expensive to repair in the event that a problem occurs. Most problems occur within wires, wire connections, relay or capacitor. Even if the entire control box needs to be replaced, these components can be replaced less expensively without having to replace the pump.
Control Panel for RL 12G15-3W2V Red Lion 4" Submersible Well Pump