On Mon, 15 Aug 2005 15:27:01 +0100, "Set Square"
wrote:

In an earlier contribution to this discussion,
Andy Hall wrote:

On Mon, 15 Aug 2005 12:52:10 GMT, newman wrote:

I am replacing some kitchen plumbing with Speedfit plastic pipe and
fittings. Does the plastic pipe need insulating against frozen pipe
problems which I have had in the past in this location?


Regards


If the location is such that the pipes were subject to freezing
before, then they still will be. Plastic pipe conducts heat less
quickly than copper, so the water will cool less quickly, but the
effect of insulation is to slow that down considerably further.

Personally, I would insulate this if there was a problem before.


Do the pipes get pushed out of the fittings if they *do* freeze?


I don't know, but since there will be an expansion of the water as it
freezes, it is not going to help

If there is going to be a failure, I would have thought that this
would be the likely area, as pipe manufacturers do say that the pipe
itself won't split.

http://www.johnguest.com/linkpages/SPFinstADV.html


--

..andy

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