What it's all about

In article liD5e.3389$8Z6.3382@attbi_s21,
"Grumman-581" wrote:

Why don't you just turn the water off to the condo when you're not there?

Not so easy -- valve is in an awkward place (condos are raised a few
feet above grade on cement sonotubes). Not so easy to tell renters or
friends using the place how to do it.

Pipes might still freeze and crack above the valve unless you drain the
system, which is even messier -- or below the valve but short of the
meter, which means you arrive to find a problem, even if it's not
necessarily your problem.

If it's going to get really cold, have to drain toilets, open all
faucets, put antifreeze in traps and so on as well.

Not sure what else prolonged severe cold might damage.

Best to just keep it at minimal temp.