2 Maintains water chemistry by using various chemicals to conform to City of Dallas health codes; checks the chemicals, alkalinity, cynaric acid, and chlorine levels; ensures the valves, motors, and chemical pumps work, have no leaks, and all mechanical equipment working properly. 1 Installs, maintains, and repairs swimming pool water pump equipment and systems by dismantling, replacing, reassembling, and adjusting equipment to ensure safe and efficient operation; identifies leaks or other weaknesses and performs the necessary repairs.