SIMPSON pressure washers are engineered, manufactured and sold with the singular purpose of removing dirt, filth, grime and scaling paint from nearly any substrate. They are also designed to handle the grueling task all day, everyday. SIMPSON was purchased by FNA GROUP in 2006.Click to see full answer. In this regard, who makes Simpson pressure washer engines?Simpson Cleaning company now use state-of-the-art tech to produce their machines in a 228,000 sq-ft (4 football fields large) manufacturing plant in Decatur, Arkansas. They have demonstrated excellence so consistently that companies like DeWalt and Briggs & Stratton trust their stickers on Simpson machines.Subsequently, question is, where are Simpson pressure washers manufactured? the USA Also to know, are DeWalt pressure washers made by Simpson? Simpson makes the pressure washers in their Decatur, Arkansas facility with DeWalt badging. They also make their Simpson branded washers and the industrial Briggs & Stratton washers on the same assembly line. The pressure washers are then sold as DeWalt in Home Depot etc. and both companies profit.Are predator pressure washers any good?This pressure washer from Predator has garnered mostly five-star reviews from people who have purchased and used it. The highest reviews say that it is easy to assemble and simple to use. Even the smallest amount of gasoline in the engine gives hours of power washing.