"benpost" wrote in message
...
i dont know a lot about rads, and cant make sense of how the valves
stop the water circulating the rad. how does the flow of water get to
the 'out' pipe? the vale seems to be outside the rad so i cant see how
it stops it.

anyway main question is, is it easy to remove a rad off the wall so
that i can get behind it, as it will need replastering? do i need to
stop the water supply completely and drain the system or anything?

i have a main water stop tap and this supplies a combi condensing
boiler which heats the water and central heating.

Turn off valves at each end. Count how many turns it takes to turn off the
LSV so you can put it back to it's original position when re-fitting
(otherwise the balancing of the system will be out). Undo the nut holding
one of the valve onto the rad and have a bucket / container ready to catch
all the water. Once it's started flowing open the rad bleed valve (on the
top of the rad) to allow the rad to drain faster. Once empty, remove from
all brackets - best to carry upside down to stop all the black dirty water
dropping on your carpets!!!!