In my 40 year old bungalow, the underground central heating pipes have started leaking. I want to replace these with new piping run down from the loft to the radiators. It looks as if I will need approximately 6 down pipes to the 10 radiators. The boiler is about 5 years old and looks in good condition as are all of the radiators.
I'd be grateful if anyone can tell me a ball park figure for replacing the piping please.