> > Hello,
> > The other option (which is looking easier now) is to drain a bit from
> > the whole system and put it in the tank in the loft. I've found the
> > drain point behind a panel outside the house. There are two pipes
> > there - which one do I use? Why are there two?
> Well, I could say "use the one on the left" - or then again, it may be
> one on the right"! I'm not sure how you expect anyone to second guess
> these two pipes are - you'll need to provide a bit more information!
> Set Square
One pipe will presumably be the flow and the other the return. If you can
tell which is which
I suggest you use the return drain but either or both will do.
I had a similar scenario where I needed to put Fernox inhibitor in the
system. I did it twice
once using the radiator and once using the header tank. The header tank
Switch off system and shut off header tank flow( if no tap - tie up the
Undo drain(s) - the slower, within reason, that you do the draining the
better as the water
in the lower radiators could be undisturbed.
Time the empying of the header tank - say 15 mins - carry on for say 5
mins more to ensure
that there is plenty of capacity in the circuit. Close drain and introduce
header tank output pipe.(plastic hose could help on this)
Switch on water - switch on system and bleed as necessary.
Pray for quieter boiler !!