On Mon, 21 Aug 2006 08:15:46 +0100, Andy Hall wrote:

when you consider the time and cost of replacing inhibitor after
draining to fix one valve, it's worth it.

You don't *need* to drain down to change valves, assuming a normal open
vented system. Get the plug set for blocking the vent pipe and cold feed
and a some old towels to catch the small amount of seepage and away you
go.

I'd also shut the valve at the other end of the radiator as well and any
zone isolation valves just make sure. When doing this it is vital that
you only open the system at one point at a time, *never* two...

--
Cheers
Dave. pam is missing e-mail