<![CDATA[This study developed and evaluated an Arduino Uno R4 Minima-based automatic pump control system for managing water distribution between two storage tanks using three HC-SR04 ultrasonic sensors, two 12 V DC pumps, four solenoid valves, a relay module, and a 20×4 LCD monitoring interface. A quantitative Research and Development approach was employed to design, integrate, and experimentally test the system under controlled laboratory conditions. The ultrasonic sensors continuously monitored water levels in the two storage tanks and the main reservoir, while the microcontroller controlled-pump and solenoid valve operation according to predefined water-level conditions. The system was evaluated under seven operating scenarios involving dual-pump, single-pump, alternating, standby, and no-water conditions. The HC-SR04 sensors achieved an average measurement error of 1.78% and an average accuracy of 98.22%. All seven system operating scenarios were successfully executed according to the designed control logic. The main technical contribution of the proposed system is the integration of two pumps, multiple solenoid valves, and real-time water-level monitoring to enable flexible automatic distribution between two storage tanks. The results indicate that the developed prototype can reliably perform automatic pump and valve control under controlled experimental conditions, while further testing is required to assess long-term reliability, hydraulic performance, energy consumption, and field-scale applicability.]]>
