I have three valves on my Cardinal from front to back Black, Grey , Galley. What I did to figure out which was which, Make sure all tanks are empty fill one then go see what valve handles that area, and so on. Once I did that I took a piece of black to mark that valve and greg to mark that.
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3500 Ram 5.9l diesel
08 35 RLT Cardinal
5th Airborne Pin Box
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