So I replaced the stop-cock. In case anyone is interested:
I got a Pipe joint crimping tool from Vevor in me-anon's link.
I choose a V-Kontur one for 80 Euros plus around 20CHF customs.
It really wasn't clear whether the tool was right for the job as the instructions didn't match the tool which didn't match the markings on the box.
I made four joints and they all leaked.
However, the leaks were minor and all the same flow rate so I surmised that it wasn't a problem with swarf or anything like that but either an incorrect tool or application.
I asked Vevor which specific brand of joints they recommended but they said they couldn't say.
The instructions that came with the tool were rubbish but I found the same tool on Amazon which had some better instructions and after setting the tool to the maximum pressure and re-crimping the joints, they were all perfect with no leaks.
I broke the tool too but I can fix it with a couple of countersunk bolts.
What I did like was the swivel head which made it easy to get access to the pipes.
Total cost including tool, stopcock and joints was about 140 CHF.
(and I've got the tool for future use).
Do you really need to thread the pipe, there are push-in/clamp t connectors like this
It is sold in Switzerland so presumably legal here.
I don’t know if this is the correct size for your pipe.
Just lol at making a thread asking if you have been ripped off by a plumber, when in the end you are paying exactly what you were quoted and agreed to. Next time just provide all of that relevant information in your first post and save people the time.
Those are for multi-layer composite pipes and so not suitable for the large diameter steel pipes which come into the house, and which have threaded ends.
But then I would never had got round to ordering the tool I needed and fixing my broken stop-cock!
These threads are useful.
There are many types like this
Down in the small print, it states; “used for House connection [steel] lines for the drinking water supply”.
These are available for different pipe sizes and similar products sold in Switzerland .
Those are for steel pipe - not for cast iron.
There's quite a few pipes in use in CH; in my house alone I've found:
* Steel (Mapress fitting)
* PEX (plastic push fit stuff) (plastic with metal crimp ends)
* Copper (brazed ends)(Compression ends)
* Cast iron (threaded) - mainly the larger >1" pipes into the house
* Asbestos (drain)
* PVC (drain/airvent)
* Clay/pottery (the groundpipe)
* Lead (luckily just found in the wall and not connected)
From what I know, cast iron cannot be connected with any compression fitting, but only threaded