Yes thanks, there is a reaction between most different metals but all aluminium in air is oxidised on the surface I think so maybe no problem. There are copper and brass olives for compression fittings so perhaps somebody might know which is best
Bryn
That's a good idea to use a 10mm plumbing straight compresion coupling from the ali to the copper replacement and back again. Better than flexable rubber pipe.
Bryn
Sorry not a liquid but a gas. Can't see why an evaporator (radiator) would block other than a leak. There is an expansion valve that might be blocked if something has got into the system.
Bryn
Thanks, but it was the black and white version that I have on my computer and thought it might be of use to others in the downloads section so I was asking about uploading it.
Bryn