ECO-FLO, 3/4 HP Control Box for 4 in. Well Pump. This submersible well pump control box is designed for use with 3/4 HP 4 in. submersible well pumps fitted with 3-wire, 230-Volt submersible motors. It is easy to install. It has a corrosive resistant cover. Capacitor start and induction run design for efficient operation. Can replace other manufacturer's control boxes for 3/4 HP 4 in. submersible motors. Installs easily has numerous electric knock outs. Heavy duty terminal connections for wire as large as #4 AWG. Supplied in rugged NEMA 3R metal enclosure. Easy to read wiring diagrams