Can I bury a soil pipe in an inner cavity wall?

[v8pete]

Hi folks - here's the problem :

We're building a basic 2 story extension onto the side of our house. The soil pipe from the old bathroom loo now needs to be re-routed to drop down into the "new" garage, but first has to pass through the upstairs wall of the new bedroom (which is directly above the garage). The only option I can see is either to get the soil pipe right in the corner of the room (and thus not be too big a nusiance) and then drop it down, or somwhow get creative and try and hide it in the cavity (as the external cavity wall is now an internal wall of course!) then get it under the new floor level and eventually down into the garage. Is this daft, or is it a possible soultion?
Cheers!
Pete

 

[doitall]

No, you cannot as it will weaken the structure of the building.

 

[v8pete]

Thanks for the reply - are you absolutely certain that this is correct, as the wall I am referring to was orignally an external wall, but is now of course internal & the roof structure has been redesigned, so it won't be taking direct loads like it used to. I was told by a colleague that sometimes the external skin of bricks of the old external wall can even be taken out when an extension is added so as to give more space! - no idea if this is true!
Pete

 

[doitall]

Ask a structural engineer and the building inspector when you submit the plans.