DESC: Added capacity for reduced down time due to emptying the tank. The 15-gallon tank gives this unit 50 percent more capacity. Plug a tool into the built-in outlet and this vacuum turns on when the tool is turned on. It also runs 15 seconds after the tool is shut off to clear the hose of any debris. The dual filtration system with a washable automotive -type filter and a two-ply paper filter trap 99.85-percent of fine particles. The corrosion resistant polypropylene tank rolls about on large wheels for easy maneuverability. The 9 amp motor has a flat top surface tray for holding tools while working.