... drinking water device, RO filter 1.Reverse osmosis water 2.Dow, Hydranaustic membrane 3.Stainless steel Water apparatus: ... RO systems ,cleaning system, high and low pressure protection system ,automatic liquid level control system ,automatic alarm system ,automatically stop when ... protozoa, pathogens, bacteria, inorganic chemical and so on. 2) No need to add any chemicals, stable pure water quality ...