[header] How to pressure wash [title] Choose a pressure washer that fits your needs. [step] Pressure washers can be rented at a daily rate from most equipment rental stores and some hardware stores. They are available in a range of pressure capabilities, from about 1200-3000 psi, or pounds per square inch (8300-20 , 700 kpa). 
A low-pressure model is better suited to more delicate surfaces like aluminum siding, while high-pressure models are great for concrete and brick. Make sure to rent a model that has a detergent reservoir if you want to use detergent.