Starting from the ancient time to the now developed world all human beings are battle withoutrest against waterborne diseases so as to minimize its health and environmental effect. In Ethiopia, peoples live in rural area drink un-treated water without any sort of treatment. But, it leads to different waterborne diseases and resultsfor the death of numerous peoples every day. Therefore, this study was initiated to design, assemble and performance evaluation of continuous dual filter treatment device used to treat drinking water. To check the performance of the device activated carbon from rice husk having a particle size of 2mm, sand filter having a size of 0.7mm, 1mm and 6mm and defatted moringa seed extract was used as filtering medium and disinfection solution respectively. Thestudy also investigatesthe effect of filter bed arrangement, filter bed ratio, the dosage of moringa for disinfection process and the effect of ceramic filter where analyzed. To check the treatment efficiency of the device samples was taken from Lake Tana and 3 replication experiments were done. Standing from the experimental result analyzed by independent sample T-test, one-way ANOVA, and MATLAB a maximum treatment efficiency of 84.7% reduction in turbidity, with a maximum flow rate of 34.6L/hr was achieved. During this treatment process a bed arrangement of sand at the top and activated carbon at the bottom, with a bed height ratio of 25% activated carbon and 75 % sand and 175mg/l of defatted moringa powder solution was used. Even if ceramic water filter results to high turbidity removal than any arrangement with any order because of its low flow rate (1.2 L/hr.), it is not recommended to use it as one filter bed in the continuous treatment process.