For me, centerline makes accessing the tanks in any way in the future nearly impossible. I saw an update from the Bertha Bus folks on facebook - they undersized the drain on the gray water, and the tank started accumulating sediment. No way to fix that other than get the tank out, and I can only imagine the work required if I have to cut structure out of the way to get the tanks in first.
There's simply not enough room to scootch the tanks in from the front, the angle is too tight to work around the fuel tank, and in the rear, the axle housing is in the way as well. That leaves slicing a big hole in the bay floor.
At that point, if you do get tanks in place, it's impossible to access any of the wiring and plumbing going down the frame (that had access ports before) or even getting to the hanger bolts for a centerline setup. Let's not forget that I'd have to lift the bus up to get the 15-16 inches of clearance to slide the tanks in from under. I don't have a 4 post hydraulic coach lift.
I'm pretty convinced the outboard tanks will work great.
I can disconnect fittings and slide them out easily enough.
There's room for insulation and plumbing.
There's now room in the middle for water pumps, filters, pressure bladders, and valving, which is still accessible just by the fact the tanks don't take up the fore to aft length up.
I'll still be able to install batteries centerline, however. They're just not as huge as the water tanks are. The clearance between lowest point on the frame to floor of the bay is 12", which is an inch larger than the height dimension of most batteries I'm looking at.
I would, dare I say almost state that a luggage bay is pretty limiting in some respects. In others it's nice because it is finished out with doors and a floor.
Originally Posted by family wagon
The problem with hanging them centerline as originally planned is that they'd fit the space, but only if they could somehow get through/around the narrow pass between frame and luggage floor? That's what I'm up against with one of my tanks. No luggage bay floor (yet), but I want one of the tanks above my wheelchair lift. I'll have to drop the lift a few inches, slide the tank in, then re-mount the lift. Not looking forward to it.