On Fri, 03 Jan 2014 20:20:36 -0500, wrote:

On Fri, 03 Jan 2014 18:47:37 -0600, Gordon Shumway
wrote:

On Fri, 03 Jan 2014 17:40:35 -0600, philo* wrote:

On 01/03/2014 05:21 PM, Gordon Shumway wrote:
On Fri, 03 Jan 2014 16:11:35 -0500, Stormin Mormon
wrote:

Tonight in NYS supposed to be 0F, and wind
chill -10 or so. Which number is the one
which concerns water pipes freezing?

I know the pipes won't get below the actual
temp, but are they more likely to freeze,
with wind?

Wind chill is the effect the combination of cold air and wind has on
exposed flesh relative to only cold air. "Wind chill" has absolutely
no effect on inanimate objects. The wind on an inanimate object will
cool an inanimate object to the ambient temperature quicker than no
wind. It is impossible to get an inanimate object colder than ambient
temperature by using wind that is also ambient temperature.

Now, don't ever ask that question again or I'll turn this car
around...




That's absolutely correct but trader4 made a valid point.


Air in a wall would be warmed by the house and if no outside air got in
would act to keep the pipe warm. With a strong wind blowing, any warm
air trapped in the wall would be dissipated pretty fast.

What I said is completely true, period. What the temperature in the
wall that contains the plumbing is, or will become, whether it's
insulated well or not at all, is the ambient temperature, period.

Granted, plumbing in an outside wall that is poorly insulated will
have a greater chance of freezing at a given outside temperature when
it's windy than not but that's what was contained in my statement.

Damn it, I WILL turn this car around! I'm not kidding.
Just don't do 100mph in a 60mph zone. Remember - it will be ZERO F -
not ZERO C.

Huh?

If the ambient temperature gets to the pipes they WILL freeze.

Umm... technically, the temperature where ever the pipes are IS the
ambient temperature for that portion of the pipe.