rainwater pipe wrong place

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

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.

Hi. it runs under the slab so we can't cut into it at ground level. The drain is 4m away so maybe it's got to be a new run and cap this off which is a shame.

pgtips said:

Hi. it runs under the slab so we can't cut into it at ground level.

Click to expand...

Below the slab? Why can't you rummage around with a shovel and connect into it?

Rainwater apart - why is there a pipe bisecting what will be a load bearing corner? Whether the pipe stays or goes, doesn't alter the fact that you have a weak spot in a pretty awful place. I'd be ferreting about under the slab and reinforcing that corner with a bit of underpin concrete.

Hi
Slab is 5" c40 with a393 mesh, runs to the drain 4m away. Drain's simply in the wrong place but I think we've figured what to do.
The easiest option, I can afford to lose some space over one side so brickie is going to build in front of it. Keeps everything as it should be I.e rainwater on the outside.

You could stick a 45 degree soil branch onto it, and cap the top, that way you've directed the pipe back outside.

Leave your outer skin as you have it in the picture, you can then bridge over it above the capped off section and continue the wall up.

You'd need an external cover piece, (bit of cement board?) on the outside to cover the pipe and close the cavity.

This would create an annoying feature at the corner, but once built in you could forget about it, and you wouldn't lose any space.