Filling the Water Tank: Symphony Vacuum and Steam Mop Learn how to fill the water tank on BISSELL Symphony Vacuum and Steam Mop in this step-by-step instructional video. Browse more videos to get the most out of your Sympphony Vacuum and Steam Mop. Video Transcript: Filling the water tank on the Symphony is quick and easy. Simply open the Easy Fill opening of the water tank and use the included water cup to fill the water tank with water. Use room temperature distilled water for best results.