Job Description: Installs, repairs and provides preventive maintenance for heating, air-conditioning, ventilation, water treatment and other building mechanical systems and equipment.Repairs, replaces and provides preventive maintenance on bearings, belts, pulleys, pumps, fans, compressors and other mechanical components; maintains and adjusts controls; and aligns equipment.Dismantles equipment to access moving mechanical parts; cleans and lubricates moving parts; removes and replaces defective or damaged parts; and reassembles machinery.Monitors and corrects swimming pool water flow rate and backwashes filters.Checks water hardness and alkalinity in swimming pools and water softeners.Removes scale from pool walls wit