Watts Premier Reverse Osmosis Systems are WQA certified. WQA independent certification means you can trust in the quality of water these systems produce. Watts ‘Kwik-Change’ Reverse Osmosis Systems use encapsulated filters which are quickly and easily changed. Since the filters and membrane are encapsulated, this also means the filters themselves are not touched when installed, creating a more sanitary changing process. For an alternative to reverse osmosis, Watts Premier also manufactures ultrafiltration systems.