Brake servo pipe

Firstly forgive me if I haven't been diligent enough in my searching and the information is obvious elsewhere.

I'm looking for the name and part no. of the pipe coming out of the brake servo cylinder, and running to the back of the engine block.

I have a 2001 1.4 16v fabia.

I'm pretty sure it is the Brake servo vacuum pipe , It's just mine isn't the same as any of the photos I've seen for replacement parts. I'm assuming the one fitted to mine is an incorrect part bodge by the previous owner - one without an anti-reverse valve , and now collapsing and therefore in need of relacement.

Any help that you fine chaps can offer would be greatly appreciated.

Cheers, AJ