"Tim Tyler" wrote in message ...
Tumbleweed wrote or quoted:
"Bob Hobden" wrote in message
"Harry Ziman" wrote ...

My question is about the winter - is it necessary to remove the pumps
to
avoid them from being frozen or do they survive freezing?

Yes it is essential to ensure they don't freeze, water expands on
freezing
so they would suffer damage.

If the pump is entirely under the water, no, the pressure on all sides
would
be equal assuming it did freeze that hard.

...and assuming that it freezes and defrosts on all sides simultaneously
;-)

I think its only the freezing that would likely do any harm in that case,
but I take your point :-)

Plus as its not a sealed unit, the expansion would almost certainly equalise
anyway, like milk bottles used to via the foil top (a) when there were milk
bottles, and (b) when there were winters cold enough to freeze milk :-)

--
Tumbleweed

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