... Dow, Hydranaustic membrane 3.Stainless steel RO drinking water device, RO filter1.Reverse osmosis water2.Dow, Hydranaustic membrane3. ... filter,activated carbon filter,ultrafilter high pressure pump, RO systems ,cleaning system, high and low pressure protection system ,automatic liquid level ... ) No need to add any chemicals, stable pure water quality, and no pollution drained, low produce cost. 3) ...