On Sun, 09 Nov 2008 23:18:58 GMT, "The Medway Handyman"
wrote:

wrote:
I have replaced Ch rads etc etc on my old system but now I have a
sealed system ( Combi) and I want to sometime in the future move or
replace a rad or two. I know it's not the ideal time of year to be
doing this but I need to do it when the urge takes me .
I want to confirm what I need to do so here's what I intend doing and
would appreciate if you could point out anything I have missed or
don't need to do .

(1) switch off power to boiler.
(2) switch off water supply feeding boiler ( is this necessary ?)

If you isolate the rads via the lockshield & TRV, then no. Use a blanking
cap on the TRV. If you are not cutting into the pipework then yes.

Eh...That's confused me now ,especially that last part .

(3) Drain down system ( there is a drain tap under the floor beside
boiler),opening bleed valves to assist this

Close off every other rad using the lockshield & TRV, it reduces the amount
needing to be drained and makes bleeding easier. That way you are only
draining the pipework & rad you are dealing with.

Yeah .I understand that part .Someone else said to do that as well.