The RO reverse osmosis water purifier employs the ultra-low reverse osmosis technology to purify tap water. Cooperating the deliberately designed filtering and absorption system, the purifier can effectively remove the material harmful to health such as all kinds of bacteria, viruses, pesticide residue, heavy metal ion, etc. in the water. Besides, the purifier is especially good at removing carcinogenic substances and other morbid substances that cant be eliminated by regular means. Parameter: 1) Rated current: 11.53A 2) Rated operation pressure: 1.0Mpa/1.5Mpa 3) Pressure and rate of flow of tap water: ≥0.15Mpa ≥4T/H 4) Water yield: ≥1000L/H 5) Power of electric motor for booster pump :0. 75KW, 380V 6) Power of stage-one multi-stage pump: 3.0KW, 380V 7) Power of stage-two multi-stage pump: 1.5KW, 380V 8) Dimensions of main body (L x W x H): 1,240 x 600 x 1,550cm 9) Dimension of pre-filter (L x W x H): 2,000 x 450 x 1,930(cm)