Has anyone thought of manufacting water tanks that rupture on impact. Thus dispelling any kinetic force in an accident?
No mate, as far as i'm aware they havn't. That would be a brilliant product, but as far as marketing goes i don't think the idea of an expensive item disintegrating on impact would hold much water (pardon the pun).
The frames they all have out now are a load of crap. They're bolted through the floor in some sort of archaic fashion, and the manufactureres boast (in most cases) is that the frame "retains its integrity", rips the arse or floor out your van making it probably a right off, but still, the frame maintains its integrity.
I've now changed over from metal floor bolted frames to wood, and secure it to the pillars of the van. Mind you thats using one of the strong Wydale tanks. But yes i'm certain a more flimsier (and probably cheaper) tank is the way to go for safety, the worse that can happen then in an accident is you get wet.