Stainless steel central heating pipes

[Jones1964]

Hello.The main part of my central heating is made up of half inch stalnless steel pipes.(A plumber told me this was used as a cheaper option than copper in the 70's ).I now need to relocate some rads etc and dont know how to join copper fittings to this steel pipeCan anyone please advise if they have a solution.
Thanks Allan

 

[mysteryman]

Compression fittings or push fit. There was special flux for soldering stainless steel to copper fittings, but you had to fill the pipe to flush it out within 24 hours, or corrosion set in.

 

[Dan Robinson]

Don't forget to eat your Spinach first though. .

 

[muggles]

Compression fittings, wouldn't risk it with push fit personally