--- Martin HaHaggblomayne <mamartinhpIPELINE.COM>
wrote:
> and noticed that water was leaking out of van
> between the body seams--drain

My first suspect: the water pump housing.  I had this happen to mine, where
probably some water was left in the pupmp and froze.  the crack wasn't very
obvious and required close inspection to reveal.  Not a very expensive item
to replace at your local RV dealership.

On the other hand I've had the whole water system freeze (the tank becoming
a huge 5" thick walled icecube filled with liquid water), only to thaw
without any damage.

Fred.