The SQUARE D Well Water Pump Pressure Switch Pumptrol 30-50 PSI 1/4" NPT FSG2J21CP is a clear plastic pressure switch designed for water pumps. With a single phase operation method and an on/off operation, this Schneider Electric product has a compact design measuring 4 inches in length, height, and width. The switch has a termination type of screw and is designed for AC current operation. Ideal for water pump applications, this pressure switch is a reliable and efficient component for controlling water pump functionality.