Zvac ZPH-1 Central Vacuum System Powerhead Is One Of The Most Powerful Turbine Powerheads In The Industry. The ZPH-1 Operates Without Electricity, Using The Airflow Of Your Central Vacuum System To Turn The Roller Brush For Maximum Suction And Deep Cleaning Power. Whole House Cleaning Has Never Been Easier Thanks To The High Performance Features Included In The ZPH-1. With Its Light, Low-profile Body, 12" Cleaning Path, Super-sized Rear Wheels, Automatic Height Adjustment And Innovative Roller Design, You Will Be Satisfied With The Zvac ZPH-1 For Years To Come.