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Doggit
Excuse me Aquaheat, but apart from the heat gel, I think I pretty much described the job the same way as you did; it's great looking smart and professional, but sometimes you have to try and put things across in a manner that a beginner will understand.
I did think about suggesting the heat gel, but reasoned that the OP may not be experienced enough to use it, and could well get it all over the place, and give himself even more problems. And with the pipe in the wall, it's obviously a ground floor rad, so the upper rads will need draining, but there's obviously no method of draining the lower rads properly, hence he's going to have to eventually cut into the corner of the elbow to get the water out before he can desolder it.
And sorry Dan, I should also have suggested you isolate the rad valves as well, and then undo the pipe at the rad to drain down as much water as possible from the pipe in the wall.
Please learn to play nicely Aquaheat.
I did think about suggesting the heat gel, but reasoned that the OP may not be experienced enough to use it, and could well get it all over the place, and give himself even more problems. And with the pipe in the wall, it's obviously a ground floor rad, so the upper rads will need draining, but there's obviously no method of draining the lower rads properly, hence he's going to have to eventually cut into the corner of the elbow to get the water out before he can desolder it.
And sorry Dan, I should also have suggested you isolate the rad valves as well, and then undo the pipe at the rad to drain down as much water as possible from the pipe in the wall.
Please learn to play nicely Aquaheat.