STERLING V4 to J3 Submersible pumps are suitable for 4½" Dia bore wells. These pumps are available in 2.0. HP with head range of 370 to 600 feet. This V4 to J3 model advanced model of V3 2.0. HP Series. V4 Slim submersible pumps having copper rotor and excellent design for more discharge of water and less power consumption.