thanks for that info shaun, can you all confirm that the powerflush wont really be req if new rads are going to be installed, i would rather pay a bit more and get it done than bite me in years to come
also bg fitted a spirotech mb3 about a year ago to my sys which will also be added to the new sys , as for draning the sys well im the world worst for diy thats why i leave it for you guys, i could stick some f3 in that tank but watching it on youtube is not my idea of fun
so a sys flush ok with new rads??? my current sys is really banging away and has been for a few years so unsure if the pipes are bunged up or its the boiler and 1 rad is dead to the world