Cleaning flue component for combi boiler

Hi
I have a flu component in my combi boiler which I need to clean very thoroughly. It is called a "flue elbow" by the manufacturers and this is quite a good description I think. In this flue elbow are a couple of little tubes which are part of the pressure sensor mechanism. The flue elbow looks a bit like a part of an extremely large carburettor.
The problem is that this flue elbow seems to get coked up every couple of years and this interferes with the pressure sensor. The small tubes for the pressure sensor probably get coked up I guess. I can get a pipe cleaner down them but I don't know of any solution that could be used to assist with cleaning of them.
The main flu elbow itself is an aluminium casting. The smaller tubes within it are definitely metal but it is hard to know which one, they aren't aluminium, they could be copper, but they seem to hard for copper to me.
I'd like to know if there is a solution of some sort that could be applied to this component to bring it up shining like new?
TIA
--
Patrick


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On Thu, 13 Nov 2003 19:07:26 +0000, PJ wrote:

duster from screwfix). Do not get water in then rubber/plastic tubes or APS.
--
Ed Sirett - Property maintainer and registered gas fitter.
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Ed Sirett wrote:

sounds like you need a doctor then.
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On Fri, 14 Nov 2003 21:09:18 +0000, Ed Sirett wrote

Hi
Thank you for your reply. My original post was over two weeks ago but I was away unexpectedly which is why I now post after such a lengthy period.
The flue component is completely metal, I'm wondering if there is something stronger than water and air pressure that I could use to decoke this?
Is there a solution of some kind that will dissolve coking?
Thank you
--
Patrick


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On Sun, 30 Nov 2003 12:05:38 +0000, PJ wrote:

If the flue is full (oreen half full) of coke/carbon/soot you have a serious problem with the boiler and there will be much damage elsewhere as well and if fact you had better get it fixed properly from top to bottom.
Sorry to disappoint.
--
Ed Sirett - Property maintainer and registered gas fitter.
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