The BE-1200WAWY by BE Pressure Supply is a 12 inch Whirl-A-Way that cleans flat surfaces including vertical walls quickly, easily, and evenly. Use it, along with a power washer, to clean large flat surfaces such as long driveways, parking lots, rooftops, or pool decks. This flat surface cleaner prevents zebra striping and increases your cleaning time by up to sixty percent over a regular nozzle. This model has water flow out from the brush away from the user and zero wall clearance cleaning. Minimum pressure 2000 psi, 4GPM.