In article .uk, Ed Sirett wrote:
On Tue, 30 Dec 2003 20:05:37 +0000, Dan delaMare-Lyon wrote:

In article .uk, Ed Sirett wrote:

I may be wrong but, it is my belief backed up with some experience that
there is nothing that can absolutely remove the problem except boiler
replacement. Nevertheless cleaning out, desludging, and descaling may
reduce the noise much. INHO the only product which I would _expect_ to
work is the Fernox Boiler Siliencer Gel which comes in a large yellow
(sealant gun) tube and will probably cost in excess of £25. If nothing
else my experience is that the noise will be softened to 'thudding' which
is less obtrusive. Converting to a sealed system would also definately
help where this is a reasonable course of action.

£16 or thereabouts at Plumb Center if you smile sweetly ;-)

Ed, on this subject - if you had to drain down (open vented system),
refill, cleanse, noise silence and inhibit - all using Fernox products
- what order would you do the Noise Silence/Inhibit in?

The only product that would be from Fernox would be the Silencer Gel
itself.
The first half of the inhbitor would go in the header tank as soon as
I was sure the drain point was not going to leak, and the 2nd half as the
filling was nearing its end.
The gel would go in a radiator that cut off from both ends then
partially drained the injected into the bleed hole with the blank plug
removed.

Gotcha - thanks.

Gradually sorting out the little problems with ours - and given it's a
hard water area and the boilers old (but well maintained) I think I'll
give this a run if it clears it's next service OK. A good clean out
will no doubt do it good - and since I'm going to change a couple of
lockshields and thermostat valves as well makes sense to do it all in
one

Cheers
Dan.