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The present invention provides a 16-step purification technique. More specifically, the present invention provides a device using the purification technique, which comprises : step 1 for removing suspended matters by using palm tree charcoal extracted from palm trees; step 2 and step 3 for removing suspended matters for a second time by using coconut charcoal extracted from coconuts; step 4, step 5, and step 6 for removing odors by using rare earth minerals disclosed in prior art Patent No. 10-1288444; step 7, step 8, step 9, and step 10 for removing odors and stench by using minerals disclosed in prior art Patent No. 10-1445689 mixed with anionic far-infrared balls; and step 11, step 12, step 13, step 14, step 15, and step 16 for removing heavy metals, cloudiness, and residual rust. The device of the present invention is a rotary type which can be used even in a place having a low water pressure by adding a water pressure control device (13), and since the device uses stainless steel instead of conventional plastics, a replacement operation can be performed by dividing the 16 steps into four parts. Additionally, the replaced stainless steel filter can be recycled, thus preventing the release of environmental hormones. Additionally, in steps 15 and 16, sterilization may be performed using a magnetic field.COPYRIGHT KIPO 2018