Routing a downpipe around external corner best approach?

[danlightbulb]

Hi,

Due to a guttering design flaw I have a wraparound external corner on the hip of my roof that is slightly lower than the outlet to downpipe. Hence when rain is heavy the gutting overflows at the corner.

I need to do a quick fix (correcting the levels of the existing guttering would be a significant job) so I am thinking of adding another running outlet to the other wall, dropping a new downpipe from this for a couple of feet then taking it round the external corner to connect to the existing downpipe.

Just thinking how best to route this.

Do I do a normal swan neck to take the new downpipe to the wall, then wrap it around the corner with 90 degree bends, or do I try and make the turn by some sort of compound swan neck arrangement that gets around the corner more directly.

Anyone any thoughts please? Or real life examples would be brilliant.

 

[foxhole]

Two 45’s with a short section between offer more variables and less chance of blockage .

 

[danlightbulb]

Two 45’s with a short section between offer more variables and less chance of blockage .

I can't seem to find 45 degree angles in 68mm downpipe?


Here is a sketch of the corner. The red is the proposed new downpipe and branch connector to the existing downpipe.

 

[johnny2007]

They call them 112.5⁰

 

[danlightbulb]

They call them 112.5⁰

Ah right, the same ones used for the swan neck.

Is my sketch the best way to do it?

A swan neck to the wall vertically then turn and go round the corner?

Or is there a better way?

 

[johnny2007]

2 x 112.5⁰
Where the arrows are

 

[noseall]

I can't seem to find 45 degree angles in 68mm downpipe?


Here is a sketch of the corner. The red is the proposed new downpipe and branch connector to the existing downpipe.

View attachment 421538

They call them off-set bends, in the trade.

 

[danlightbulb]

2 x 112.5⁰
Where the arrows are

Thanks. I can't tell from your picture but are you swan necking back to the wall first or dropping straight down out of the gutter vertically? If the latter, I won't be able to attach the new pipework to the wall as it will be too far out.

 

[denso13]

This kinda thing, 2 offset bends, 2 90 bends and one branch/tee.

 

[johnny2007]

Thanks. I can't tell from your picture but are you swan necking back to the wall first or dropping straight down out of the gutter vertically? If the latter, I won't be able to attach the new pipework to the wall as it will be too far out.

It's a temporary solution, a screw in each joint will keep everything there for a while.
By all means, you can go back to wall and use brackets to make it better.

 

[danlightbulb]

This kinda thing, 2 offset bends, 2 90 bends and one branch/tee.

Yeah thanks, that's what I had in my mind but seeing the picture, it looks quite ugly doesn't it.

What other options do I have? If I try lowering the existing running outlet it means I then have to work back up the gutter run lowering each bracket for probably at least a few meters up the run.