Since components such as PLC, conveyor belt, photoelectric sensor, pumps, water level sensor, and DC sources were connected together with a simple PLC program in place, preliminary testing was done and it ensured that a bottle will move on the conveyor belt, then it stops when it is detected by the sensor and happens with high reliability at the same spot then the valve automatically opens for the bottle to be filled then after a certain period it would stop, and then the conveyor belt continues on moving to pass the bottle to the next stage. Additionally, when the tank responsible for filling part has a sensor the detected its level, and the level of the water must be consistent with little variation, so a pump is connected to it to fill it from another tank depending on the water level. It was made sure that the water level is not very different between the desired lowest level and the highest level to keep the pressure consistent for the water that will be going directly into the bottle. Then, to ensure that the bottle arrives at the same spot but be placed anywhere on the start side of the belt, inclined edges were implemented to slowly allow the bottle to move into the middle of the belt. Finally, safety measures were added such as sensors to detect any human interference and an emergency button to stop the entire system.