By pass air piping for filters and dryer. Pre filter with auto drain. After filter with auto drain. Many compressor and dryers in stock.The item "Chicago Pneumatic Air compressor Duplex 30 hp Rotary screwith w desiccant dryer" is in sale since Sunday, April 7, 2019. This item is in the category "Business & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Air Compressors & Blowers\Other Air Compressors". The seller is "wayne9478" and is located in Waupaca, Wisconsin. This item can be shipped to United States.