Water pump (dynamo) manufactured by Sta-Rite American Company • Power: 5 HP • Flow Rate: The series is designed to pump approximately 20 gallons per minute (GPM) as a primary operating average based on the initial code (20ES). • Impeller Diameter: 4.15 inches (as hand-engraved on the plate). • Material: The impeller is made of Noryl, a material resistant to corrosion and heat. • Voltage: Typically operates on a dual voltage system of 115 / 230 volts AC. • Frequency: 60 Hz (compliant with Saudi and American specifications).