In article , rob
writes

"Richard Markham" wrote in message
...
I've just had both the diverter valve and expansion tank fail on a 1997
Worcester Combi.

Having taken the old valve to bits, I found the diaphragm to be almost
crumbly...

The rubber looked like tree bark.

Any ideas what would have caused this?
--
Richard Markham

need to make sure that you have no leaks letting air in the system, and you
need to cleanse, desludge and add inhibitor when you have finished and
tested the system.
rob



Will do.

--
Richard Markham