"YAPH" wrote in message
...
I recently had a job in a place that had a lot of stainless steel pipe in
its plumbing systems. I think it must have dated from the copper shortages
of the 1970s(?) (connected with the Rhodesia crisis?). What surprised me
was that many of the joints were soldered, with regular-looking Yorkshire
(solder-ring) fittings. I tried tinning a bit of stainless pipe but
couldn't get the solder to wet the pipe. How does one do it - presumably
some special sort of flux?

I always mixed my own, 50% Baker's Fluid No1, 25% water, then slowly add 25%
concentrated hydrochloric acid. I'm not sure whether it would work with
lead-free solder though.

Colin Bignell