Originally Posted by Inland RV Center, In
A full water tank, creates a lower center of gravity, which means that the trailer handles better when being towed.
Secondly, blow a radiator hose. Where would you get the water?????
Don't laugh, it happens many times, and it could be your turn, next.
Water improves your chances of getting to your destination.
Towing in the mountains, up a grade on a warm day, I blew a radiator hose. I happened to have thrown the old spare hose in the last time I replaced hoses. I put the old hose on, and using water from my trailer I was up and running again.
Resale value is another reason to have a freah water tank IMO. I wouldn't buy a trailer without one...