It's their job to maintain and repair all equipment to ensure good water quality. As a water technician, your typical duties involve calibrating equipment, collecting water samples, testing water quality, adjusting chemical levels, maintaining careful records, and creating detailed reports. The Water Purifier Technician will be responsible for installing, repairing, and maintaining water purification systems for residential and commercial clients. The technician will also be responsible for ensuring customer satisfaction and providing excellent service. It's their job to maintain and repair all equipment to ensure good water quality. As a water technician, your typical duties involve calibrating equipment, collecting water samples, testing water quality, adjusting chemical levels, maintaining careful records, and creating detailed reports.