On Tue, 18 Aug 2020 18:42:32 +0100 (GMT+01:00), Jimk
wrote:

Andrew Wrote in message:
On 18/08/2020 14:39, Mike Halmarack wrote:
On Tue, 18 Aug 2020 13:53:58 +0100, Roger Mills
wrote:


Can you post a photo showing what it looks like?

https://i.postimg.cc/LssWL0T3/rising-main.jpg


If the whole vertical run of this pipe is not mechanically
supported then the compression joints will be constantly
trying to pull themelves apart, which is not good.



This is three floors?
How do compression joints "pull themselves apart" exactly?

The last plumber who came around said that as the pipes flexed during
changes in pressure and on and off use, the joints worked loose.
This is made worse by bits of disimmilar pipe being connected
together. Also that the pipework is just hanging there, instead of
being held firmly in place by various possible means.
--

Mike