Answer
For general cleaning of a brick siding and/or driveways, I would recommend a pressure washer with at least 2000 psi. Now if you have 2nd story levels to reach or if you have embedded stains that need to be removed, I would suggest you purchase a gas pressure washer with at least 2600 psi. Regardless, I would suggest you use a detergent to assist in your cleaning. This will always make the job alot easier to complete.
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