I am changing a couple of radiators for new rads. The width including new fittings (inc TRV) is the same as the old rad, so I don't need to move the pipes. However, the olives are well and truly compressed onto the pipe, so no chance of removing them and the old compression nut behind the olive. I could cut the pipes back and solder on a new piece of pipe, but what's the point if I don't need to. The fittings on the old radiator were brass, and although the thread is identical, I am concerned about mixing the brass of the nut on the old fittings, screwing onto the chrome plate of the new fittings. Thinking of reactions over time in the metals and possible failure... don't know much about this sort of thing, but think it can happen where metals meet...?
Is there any cause for concern?? If the olives are in good nic and I put a new wrapping of PTFE tape round between olive and fitting will this be OK?
Cheers