Pure water reverse osmosis system 1.capacity:500LPH 2.water treatment machine 3. easy to ... of each filter as follow:Raw water pretreatment systemPretreatment system of reverse osmosis water treatment equipment is usually composed of ... pure water, however, a large amount of inorganic ions, organic matter, colloid, microbe and pyrogen are withheld from RO membranes. Pure water reverse osmosis system ...