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Aquious - PCI Membranes, a part of ITT Industries' Advanced Water Treatment division, has been designing and manufacturing membranes and membrane systems for more than 35 years and was a forerunner in the commercialisation of Reverse Osmosis in the 1960s. The further development of membranes led to the broadening of the technology portfolio to include first Ultrafiltration, then Nanofiltration and Microfiltration products.