We have you covered!Unless this is being put into a box van, the Apex 570 sits too high for a submount tank. If you aren't going to carry on board water, make sure the installer shows you where the inlet pressure regulator is, and how to adjust it.
If you hit that with high water pressure (apartment developments as a prime example), the excess pressure can throw it out of adjustment.
Easy fix, but frustrating if you don't know where it is and how to do it.
Is yours an extended? I was able to fit a hydro well behind my machine, with a 400' hose reel in the driver's side, and chem shelf on the passenger sideI have a standard roof Transit, wish I would've gone higher. I'm thinking about just putting in a small fresh water tank between the reels (back doors) and the waste tank, for the occasional job where I can't get to water.