thanks for the reply, i have actually replaced the pipe with a new one. i manged to get the info i needed from someone at the citroen dealer. the pipe connects directly underneath the lhm tank, which you need to remove to gain access, to what i believe is the height corrector as the other sphere connects to this aswell. apparently its near impossible to remove the old pipe and route the new one on the same path so my new pipe travels behind the engine to the sphere. it took me around 4 hours to do. im real pleased as i love my xantia and didnt really want to get rid of it, especially as ive only recently had a new clutch and timing belt!!!