On 25/03/2014 11:01, ss wrote:
On 25/03/2014 09:47, newshound wrote:
Possibly, or the diaphragm in it may have failed as another poster has
described. In that case you should notice water coming out of the
"inflation" valve when you prod the pin in the centre. Unfortunately,
some vessels are not very accessible for pumping up.

I have downloaded a PDF on the boiler and it looks like I may well be
fotunate in that the vessel is accessible by just removing the main cover.

See attached pic, I have preseed the centre of the valve, air hisses out
but no water, Do I now just top up with air at the indicated point?

http://i64.photobucket.com/albums/h1...ps5295b86e.jpg