Even lagging is not always enough. During that big freeze in 63, pipes
underground were freezing. A little messy when the thaw came.
Brian

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The Sofa of Brian Gaff...

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"R D S" wrote in message
...
We've a 15mm plastic mains water pipe on an outside wall.

I haven't got around to lagging it yet so as a precaution i've been
turning it's supply off in the evening and had been expecting to open it
up and find it frozen.

Having had no bother and it being zero and under recently around these
parts i'm wondering at what sort of temperature you'd actually get
freezing?

I realise that rather than debating this, a better use of my time would be
to go and get some lagging!