Drains for extension above ground

selfbuildextension · 22 Sep 2019

Hi,

It would appear based on my drain layout that if I connect to existing “underground” drain it would be above ground along the rear elelevation due to the distance and downward slope of plot. The FFL will be about 1m above ground level at the rear. it’s a suspended timber floor.

How would you normally get around this?

Thanks

lostinthelight · 22 Sep 2019

Back drop manholes?
https://www.drainageconsultantsltd.co.uk/about-drains/drainage-gradients-falls/

selfbuildextension · 22 Sep 2019

I think I have the reverse issue, my slope runs downhill from the front of house where main sewer is) to back and existing drains are all ok with this. So the pipe is deep underground at the street, but only just under the surface at the rear, I then need to run 4m further back and then 6m to the side. Which means by the end of the run I’ll be above ground as the garden drops another 3-400 mm, maybe I need to draw this out.

lostinthelight · 22 Sep 2019

selfbuildextension said:
I think I have the reverse issue, maybe I need to draw this out.

Sounds a good idea

^woody^ · 22 Sep 2019

Raise the ground level

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Drains for extension above ground

selfbuildextension

lostinthelight

selfbuildextension

lostinthelight

^woody^

DIYnot Local

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