Rad change Drain Down

[bcp]

Hi Guys, I have a job changing 6 rads. The system is a Combi, and I've never done this on a combi before. I gather that a drain down is necessary (no F&E tank to bung) so what do I need to shut off water-wise at the boiler (power - yes I know)?
Ta

 

[johnmcginty]

There will (may) be a filling loop which looks like a flexi with a washing maching connector attatched to the boiler . Turn this off and bleed the highest rad then drain down.

 

[bcp]

Thanks johnmcginty I am obliged to you.

 

[migoplumber]

if your system is installed well, you should have a drain valve, or radiator with in bujilt drain off on your lowest point.
it will take ages to do it just by the bleed valves!!

shaun

 

[david williams]

the filling loop should already be turned off and disconected