Thanks Andy, I have decided just to buy a replacement valve from the Plumb
centre and accept that I shall have to part drain down the system. The
valve is at first floor level so the bottom radiators and boiler can be
left.

"Andy Hall" wrote in message news:4878df96@qaanaaq...
On 2008-07-12 17:10:08 +0100, "Stewart" said:

The MV2-22C Tower Valve on my central heating has failed and I shall have
to
snip
snip