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Old 06-13-2013, 08:03 PM   #9
twstdpear
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Join Date: Nov 2012
Location: Northern VA
Posts: 62
We have the Cougar 28rbs which is a nearly identical floor plan. We have 56gals of gray water split between two 28gal tanks, a 28gal black and 43gal fresh.

Ours is set up exactly as x96mnn said, gray 1 is the galley tank, gray 2 is the bathroom tank and they are totally separate. We have two sewer connections, one just for the galley that's just in front of the wheels, and the gray2/black one behind the wheels. The fresh water tank is near the front and it has its own button on the indicator panel.

That's not to say your passport is set up identically to ours, but given the floor plans, it seems likely. Two separate 15gal tanks seems unlikely because those are very small gray tanks. How many dump valve handles do you see when you look under your trailer? Make sure to look in front of the wheels as well. I'm leaning towards two tanks given you have two gray buttons on your indicator panel and I'm expecting you'll find a dump valve in front or between your wheels.
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