On Mon, 15 Dec 2008 13:06:52 -0800 (PST), "
wrote:

On Dec 15, 2:54?pm, termtests wrote:
We're going through a nasty cold spell right now (-13F/-25C to
-22F/-30C) and it's expected to last for quite a while yet. ?And my
coworker suggested that I turn the main water valve off in the house
before I leave in a couple of days for a vacation.

I will still have my furnace running when we leave for vacation, but I
plan on having it maintain a temperature of 60F/15C while we're away.

Is turning the main off still a good idea? ?Also, should the furnace
be set at a little higher temperature while we're away when taking the
outside temperature into account? ?Thanks for your time and courtesy.

turning water off good idea, and if you have a friendly neighbor put a
lamp activated by a thermostat if the temperature gets too low.
ideally a flashing lamp

If you have a boiler, you need to maintain water to it. It usually
doesn't need much, but if it needs any...