robgraham wrote:
On Apr 2, 4:19 pm, John Rumm wrote:
On 02/04/2013 09:45, newshound wrote:

On 01/04/2013 23:30, John Rumm wrote:

A tale of woe for your entertainment:

http://wiki.diyfaq.org.uk/index.php?...e_rubbing_pipe

Could have been thermal movements, could also have been fretting
from small amplitude vibration in the system.

Pretty sure it was thermal - there is no vibration that you can
feel or hear in the system and it is a very long straight run of
22mm that is fixed at the far end. Some form of galvanic action was
also a possibility.

Looking at the scale deposit on the pipe, suggests that it had been
leaking for a while - but possibly at a rate where it evaporated
before causing any problems. It also occurred to me, that having
relatively recently fitted a scale inhibitor (phosphate doser) to
house hot water supply, that may have prevented scale from
resealing the hole quite as effectively.

--
Cheers,

John.

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Well written story, John; I'm not sure I would have had the presence
of mind, or the will, to photo it all..

A photo of John fixing it is missing:-)

--
Adam