There was a discussion previously from someone who had to tear his bus apart due to a leaking crossover hose between the two tanks. While mine was up in the air this morning, I took a picture of the crossover hose under my Liberty. It is easily accessed and possibly it has been changed out in the past. Not sure if the foam has been cut away or if it was built as pictured. Mine has a total of 250 gallons, 160 + 90 according to the paperwork.
CIMG0067_1.JPG