I noticed a slight damp patch near hot water cylinder ... it would only
be there on rare occasions ... finally found the cause.

There is a vertical 28mm zone valve (220V actuator) on primary loop ....
and a slight leak from there.

It is not leaking from either of the compression joints ... so must be
coming out via the central ball valve actuator.


It's a Cimberio 28mm valve one of these:
http://www.c-o-k.ru/library/catalogs...8387/63366.pdf

On page 161 (3rd page in) it shows an Oring & gasket kit ..........
anybody ever serviced one of these valves in-situ


I'm assuming parts will be available.

On Friday, 1 July 2016 21:56:14 UTC+1, rick wrote:
I noticed a slight damp patch near hot water cylinder ... it would only
be there on rare occasions ... finally found the cause.

There is a vertical 28mm zone valve (220V actuator) on primary loop ....
and a slight leak from there.

It is not leaking from either of the compression joints ... so must be
coming out via the central ball valve actuator.


It's a Cimberio 28mm valve one of these:
http://www.c-o-k.ru/library/catalogs...8387/63366.pdf

On page 161 (3rd page in) it shows an Oring & gasket kit ..........
anybody ever serviced one of these valves in-situ


I'm assuming parts will be available.

You're probably better replacing the whole thing.
Often there is wear on the shaft & the repair job doesn't work/last very long.
It's only a cheapy (made out of brass) which dezincifies.

On 7/5/2016 6:32 AM, harry wrote:
On Friday, 1 July 2016 21:56:14 UTC+1, rick wrote:
I noticed a slight damp patch near hot water cylinder ... it would only
be there on rare occasions ... finally found the cause.

There is a vertical 28mm zone valve (220V actuator) on primary loop ....
and a slight leak from there.

It is not leaking from either of the compression joints ... so must be
coming out via the central ball valve actuator.


It's a Cimberio 28mm valve one of these:
http://www.c-o-k.ru/library/catalogs...8387/63366.pdf

On page 161 (3rd page in) it shows an Oring & gasket kit ..........
anybody ever serviced one of these valves in-situ


I'm assuming parts will be available.

You're probably better replacing the whole thing.
Often there is wear on the shaft & the repair job doesn't work/last very long.
It's only a cheapy (made out of brass) which dezincifies.



Looks like that is my way forward - manufacturer can't identify the
spares even through I quoted their web site & manual.

At least a 'friendly' plumbers merchant had an £85 +vat Honeywell valve
he let me have for £25 cash