Professional pressure washing companies use a variety of equipment to clean parking lots. The most common equipment used is a pressure washer, which uses a high-pressure stream of water to clean the surface of the parking lot. Pressure washers come in a variety of sizes and power levels, and are designed for different types of surfaces. In addition to the pressure washer, professional pressure washing companies also use a variety of cleaning solutions and detergents to help remove dirt, grease, and other difficult stains from the surface of the parking lot. Depending on the size and condition of the parking lot, additional equipment may be needed such as brooms, brushes, and shovels.