thescruff wrote on Feb 19th, 2013, 1:34pm:I would dig between the stopcock and the wall first to see what you find without too much damage.
This is just what I did, thanks. The alkathene mains pipe was terminated (buried about 6" down in soil) with a brass union, going to what seemed to be 22mm copper - then disappearing through the house wall with no sleeving etc.
I broke this down and made up a 22mm tail, reducing to 15mm and going through a new hole in the house wall above soil level - sleeved in a brass tube and now lagged. However my new tail would not fit into the brass union which I guess must be 3/4" NOT 22mm. Anyway, as there is no plumbers depot on the island I carefully ground out the inside of the union till my new pipe would fit.
Inside I fitted a compression tee and ran new pipe to the loo and sink, capping off the old 15mm feed pipes where they came up through the floor. Turned it all on - job done! (no leaks!)
Thanks for all your advice - now have a leak free house...
Cheers,
Andy