*Updated* Fresh Water tank fell off while driving

we never travel with anything in the tanks, period.

I don't trust them on the road at all

we carry drinking/coffee water in the truck, put a little fresh in the tank for a "Walmart" shower and always empty holding tanks before hitting the road

all three tanks in our 7 year old tt are sagging to some degree, they are "hanging" off angle iron supports all around and have 1/2 inch steel straps under them(added by a previous owner

I have to tilt the tt on 2 by 4s on the kerbside to empty them fully