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Andy Hall Andy Hall is offline
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Default Leaking Hot Water Cylinder

On 2006-11-18 20:13:49 +0000, Jeff Allen said:

Grunff wrote:
Jeff Allen wrote:

My open vented indirect hot water cylinder has developed a slight leak
around the top pipe connected to the coil heat exchanger. See here for
a pictu

http://tinypic.com/view/?pic=2zq776r

I presuming this will get progressively worse. Is this something that
can be repaired or will it be time for a new cylinder soon.




You simply need to remake that joint. You don't even need to fully
drain down, just the coil. You should be able to shut off its feed from
the header tank, and if you're lucky there will be a drain cock
somewhere.



Thanks for the advice but it's actually leaking around the coupling
that's integral to the cylinder, i.e. the bit that comes pre-fitted to
cylinder rather rather than compression joint.


Normally if the cylinder is on the way out - copper has corroded
through around the fitting, you would expect the leak to be at that
location. Somebody else had that problem this past week and needed
a quick and temporary fix until the cylinder was going to be replaced
anyway.

The photo isn't completely clear, but in the position that you have the
arrow, it looks as though it is a place where the male threaded end of
the compression fitting.

Really there are two choices.

- Take the connections apart as Grunff has suggested. If the leak is
around the threads of the fitting, it should be possible to reseal it
with PTFE tape or hemp and Boss Green.

- Replace the cylinder. Perhaps the best approach would be to
identify a source of a replacement cylinder, attempt the repair and
then if that proves not to be possible, replace the cylinder