rainwater pipe wrong place

[pgtips]

Hi,

our rainwater pipe is set too far in the base. You can see in the picture if we build the cavity wall inside it we'll lose 2 block and cavity 100mm thickness on 2 walls which is a bit too much.

In the pictures you can see this. Q. Whats the best way around this?

Cutting blocks to cut in around it seems like a unsatidsfactorary option and irregular shapes aren't great. I thought run the pipe outside the wall externally into the last part at the bottom of the wall but that makes it bit be weaker and pipe inside the wall is not wanted.

I can't be the first person to have this. Fortunately only 1 corner to solve.
note The grey brick is a mock up where the cavity filler will be. Its an external garage with a low timber roof, this is a rainwater drain pipe.

Thank you,
PG

 

[Deluks]

What direction does it go once beneath the slab?

You could dig down, intercept it and fit a new vertical pipe where you want it.

Or you could cut it flush, cap it, and build over it. Then fit a 68mm rainwater boss on the side of it, below the concrete.