My CH piping from the end of the 22mm flow and return pipes consists of a couple of 22-22 to 15mm Tees( with a 10mm reducer) but there is also a brass manifold at the end feeding 4 other rads with microbore.
I am thinking of getting rid of this to tidy up what is a bit of a dog's dinner but was wondering ( out of curiosity) as I looked at it what was involved in soldering copper pipe to brass ...are there any tricks to it?