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My Cougar 277RLSwe has a Black tank 1 and a Black Tank 2 on the indicator the black tank 2 reads empty all of the time. I only have one black tank. I have two gray tanks and I have 3 levers a black tank, a gray tank, and a Galley (gray tank) There is no 2nd black tank. all three tanks flow into one outlet.
Mel
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