"Patb" wrote in message
ups.com...
On 17 Aug, 23:16, "Heliotrope Smith" wrote:
"Patb" wrote in message

oups.com... On 16
Aug, 19:13, "Heliotrope Smith" wrote:
"Patb" wrote in message

oups.com... After

replacing the ball valve, thinking that was leaking and causing



the overflow to go, I have just realised that warm water is coming
up
from the immersion in the bedroom up into thelofttank.
Grateful for advice on what I should do to stop this,
thanks

If the cylinder is heated indirectly from your boiler then it is
most
likely
that the primary water coil is perforated.
Only option is to replace the cylinder.

OK, not an expert but....

the water can be heated by either the immersion of the Gas boiler.
The central heating system is vented.
Re the water getting into the tank, not sure about this. It is coming
in from a large pipe that connects to the tank in theloftvia the
side of the tank at the bottom. Do I have to track this pipe to see
where it connects to the immersion?
Thanks for the feedback so far

When you trace that pipe back I am sure you will find it goes down to
the
bottom of the cylinder (immersion as you call it).
That is the cold feed to the cylinder.

Have a look inside the SMALL tank in theloft(the boiler header tank).
Is this continually dripping but not overflowing?- Hide quoted text -

- Show quoted text -

Thanks for all the feeabck so far.

The latest in the saga is that the tank in the lost went into overflow
mode last night even though neither the gas boiler or the immersion
was on. So cold water is coming into the loft tank. I had assumed that
it was only hot water that would come up due to convection.
Is there any problem with draining the large tank right down so I can
actually see the water coming in?

Heliotrope, I will look in the small loft tank and report back (why is
life so complicated? Still don't realy understand why we need to have
tanks of cold water sitting in the lost in the first plalce)


..
I am afraid it looks more and more likely that the coil inside the cylinder
is holed.
It makes no difference if either the boiler or the immersion heater are on
or not.
It would seem that the small tank is higher than the large tank. The small
tank contains the water that is inside the coil in the cylinder, so if the
water can get out it must try to find the same level as that it started at.