froze overnight at -8 C outside, -5 C in van. Daytime temps -4 C. Tank
about 1/3 full.

was windy, if that makes an difference :)

alistair

On 13-Mar-11, at 10:32 AM, Dave Mcneely wrote:

> This was the idea I was addressing a good long while back, when I
> asked how cold is problematic for the water system in our campers.
> I got a little bit of a ribbing for allegedly not knowing that water
> freezes at 32 F.  Of course, what I was trying to understand was how
> cold does it have to be outside to get cold enough in the van to
> freeze the plumbing.  That depends on other conditions, though, like
> how long has it been cold, is the van heated, was the van warm at
> nightfall, was it sunny or cloudy during the day ................ .
>
> mcneely