Cheers MickyG, mine is not listed the number for mine is 000VAL09010/0. Very similar to ones used on Alpha CB24 so I'm told, it uses the same diaphragm and has the micro switch sat in the middle on top.
Ok spoke too soon, just started to do the same old problem again, sometimes doesn't fire up. On CH it's 100%, when on DHW the rads will heat up. Worked fine for 10 days so just wondering if dirt etc causing a problem? New div valve???
Ravenheat LS 100T boiler. Replaced the diverter valve diaphragm at the weekend and solved the problem of dhw taking several attempts to fire up. The problem now is that the rads heat up whenever the dhw is turned on. It used to do this before. Seems like the valve still has a problem???? Cleaned...