water from above

[golf]

I think the wording in Article 12 was the relevant part .. something about who is responsible. I figure I'm responsible for the pipes buried under my floor that service my house. Right?

Correct.

[Eiger John]

We're going through this at the moment and in our situation the situation is resolved by looking at which house the pipe serves. So our hot water piping is leaking to the downstairs neighbour thus we pay.

Seems a little at odds with what your lawyer said.

Depends, I don't know: 1) what your situation is; or 2) who is "resolving" your situation. In other words, I don't know where the leaking pipes in your house are or whether the cause of the leak fits into one of the situations that might force your downstairs neighbor to share costs. And I also don't know whether you're currently in a dispute about the water leak/damage in front of anybody who is trying to interpret the law ... or if you've just got a screaming neighbor and/or bossy building committee trying to tell you what they think the law is.

I think the wording in Article 12 was the relevant part .. something about who is responsible. I figure I'm responsible for the pipes buried under my floor that service my house. Right?

Again, there are a couple of options. But there are also risks to not getting stuff fixed. One of the big problems in water-leak situations is the lack of trust anybody has about whether if they fix the leak they will be able to force their neighbor to finally pay. Of course that also applies to an awful lot of stuff.