[twindman]

I just had a thought on the fresh water tanks and why most have no problems with them breaking. The black/gray tanks are connected to a solid 3 inch drain and a solid input from the toilet, etc. So the weight in the tank is pulling on the connections when bouncing down the road. The fresh tank probably has a light pex hose input and out, so nothing pulling on the top of the tank.
I have never traveled with a full tank except for once in a great while when boondocking. But I may change this policy after thinking of this!!!