6532 posts · Joined 2007. #9 · Jul 5, 2015. I ran mine with and without a tank. 6"x40"x3/8"wall. It takes way too long to fill tires without. I run 2 ARB compressors. With the tank the pumps come on a few times a day. Without they come on about the same but for less time. I run a 120/150 psi switch. More @Wikipedia
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