I can't speak for the other Jayco models, but my 2014 33RLDS has the two 40 gallon tanks connected with a 1 1/4 hose. The unfortunate part on my model is that the sending units are in the second (rear) tank. Plugging off the second tank and only carrying water in the front tank is doable, but you wouldn't be able to determine water quantity.
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2014 Jayco Jay Flight 33RLDS travel trailer, now seasonal in the Adirondacks, Honda EU3000 generator.
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