Features a single, 5.7". 3-stage vacuum motor for unrestricted airflow and superior water recovery, a sealed system to extend motor life and a pressure regulator to adjust for the floor surface. Simplifies tank filling with the easy-fill solution tank access port, located away from the electronic switch and controls. The sloped design makes emptying the recovery tank simple. Uses less water at high heat, which makes for faster drying and less chance of shrinkage or soil wicking.