3/4" imperial stopcock with odd fitting

[Nige F]

An update to this: I have my 22mm stopcock and copper metric/imperial olive ready, but have just scraped a patch of paint off the pipe going into the old stopcock and it looks like it's steel*. I tried a couple of compression fittings to 3/4" steel pipe before I pulled it all out and they always wept - is this doomed to failure? I have some water hawk this time instead of tape, which I'm hoping might help.

* There was a bit of tinned copper pipe (?) just above the stopcock, so it might be that.

to test for steel - use a fridge ( or other ) magnet . It's copper tho'

 

[GlasWolf]

I had the same problem with my house when we moved here.
We replaced the stopcock using a freezing kit because the street shut off valve was rusted and wouldn't move.

Fortunately that's one problem I don't have.

to test for steel - use a fridge ( or other ) magnet . It's copper tho'

It doesn't stick, but... the pipework I've pulled isn't copper and isn't magnetic either. According to the internet not all stainless steels are magnetic, so, umm, I dunno!

 

[CBW]

Most steel used wasn’t stainless.