hi, i want to fit an extra radiator to my system, the problem is that all my pipework is within the walls and i don't want damage the wall too much. i have a rad in 1 room and want an extra 1 on the other side of the wall in another room, it is 10mm pipework. how close to the original rad can i cut in for the new one and how short can i make the new pipework? the system is a new/replacement (3 months old) worcester condensing combi.
