Gully sticking above ground

[jorgenicolas]

Hello,

We're laying new slabs in our garden, changed the drains and because of the levels and fall we have, the people I hired came up with that (image) so the gully there will stick almost entirely above slabs. The line in red shows where the slabs will come as height, all the water will be drained in ACO channel behind where I stood to take photo. Is there any nicer way to finish this?
I have probably 48 hours until they are already nearby the gully with slabs.

Any ideas are welcomed.
G

 

[JohnD]

Where is the DPC?

 

[jorgenicolas]

Where is the DPC?

the DPC is right above the gully where the render ends

 

[JohnD]

So will be new paving be at least six inches below the DPC?

 

[jorgenicolas]

The new paving will be two bricks below DPC; surveyor said we have to take out some soil to let the airbricks breathe better, so we did that but then since the house is on a sloped street and the manhole is at the highest point in the garden (how stupid but..) I used the tile shop visualization tool to explain better.
The new gully is reclocated and that 's where the issue with the new gully sticking out too much comes since it's a low point.

 

[JohnD]

Then the gulley is in the wrong place. It appears to be a plastic one that is newer than the house, I don't know the route of its connection to the drain, but I doubt the house would have been built with drains so close to the surface. It looks like it connects to an older foul drain. There is probably a trap beneath.

As it is plastic it could probably be dug out and repositioned fairly easily, and the pipework cut back or altered.

Paving companies are often bad at drains and damp course levels, but it is a relatively simple building job.

 

[jorgenicolas]

Your assumption is correct, the house is 80-100 y/o and I am changing 90% of the drains as they were leaking and caused slight subsidence where the old gully was. I asked them to create an service (inspection) chamber so I can clean better if needed etc. but the issue here is the new slab's fall is down to the ACO draings (at the low end of hte property) while the manhole is at the higher end.

You are also correct that paving companies are not the great at drain planing hence I planned that myself as out of the 5 paving companies nobody gave any suggestions or ideas etc. so now I am ending up with the gully sticking out of the ground by 10-15 cm.

Any ideas based on that?

 

[JohnD]

It looks like it ought to run into the blue service chamber. But I don't know the levels.

How far down is the bottom of the manhole?

Where is the mains drainage?

It's possible to build a little brick box round a gulley. Not very elegant. I don't know if there are any regulations

I've done a few but not been faced with your problem.

 

[jorgenicolas]

The mains are somewhere after my neighbour. The drain slope run towards the existing manhole (highest point).

 

[jorgenicolas]

Regarding the brick box, that's what came to my mind, too but holding onto it as a last restort.

 

[JohnD]

Could it run into the service chamber if the gulley was lowered? The outlet will be from the trap, which will be a bit lower than the gulley.

 

[jorgenicolas]

The gully was low and at slab level, but last night, I realized I have three drains joining into one without a service chamber and asked them to install that today. we were already at the maximum fall for the drains, so we had to raise that gully about to make enough fall from what I see why my DIY eye, the gully itself is the issue here and causing the problem with its size.

I think of the following option (a bit sci-fi) can I remove the gully and use only the drain pipe and combine the while pipe (boiler condensation) and the black pipe on the right (kitchen and wash) into thet drain or the downpipe itself?
By doing that I will end up with totally flush level with the slabs. There will be left to find a something as a mesh to cover the drain (prevent leaves etc. going in there); it's exactly combining the drain into the downpipe removing the gully entirely?

 

[JohnD]

You will need a trap.

 

[jorgenicolas]

You will need a trap.

Is there any reason or just to slow the flow? That specific gully will collect only roof water and kitchen / washing grey water and nothing else. All the of the rain water will go into the aco's and from there back into the same drain all connecting into the service chamber and from there to manhole and to the mains.
This specific gully has not got a trap, it's just an extension

 

[JohnD]

You mentioned kitchen and wash, which go to a foul drain.

As I presume is the manhole.