cheers for advice, will pop down the road after my coffee! how comes 22mm fittings are too big for the old 3/4" size but 15mm fit the old 1/2" size well!... strange. at least i know now what to do and to get the job done without leaks.
Have drip coming from a pipe underneath my bath. Don't know why its leaking but discovered it after 2 hours of looking, and finally getting the bath panel off. The bathroom is old and I think the pipe is in imperial, 3/4" and not in metric 22mm. If I cut out the section and clean up and solder...