ᐅ Insufficient slope in the wastewater pipe

Created on: 22 Sep 2020 09:12
N
NicolasH
Hello everyone,

Here is the situation:
Shortly before completing our house, it was discovered that the wastewater pipe coming from the foundation slab was installed too low, and the slope toward the sewer connection is insufficient. We reported this issue and requested a correction. The defect was noted in the acceptance report and has since been resolved.

Now, the construction company is asking us to cover the costs because the wastewater inspection chamber was not in place before the foundation slab was built, so the reference point was missing. However, we were never informed about this. In my opinion, the sewer connection could also have served as a reference point. We were also never warned about the possibility of having to bear these costs ourselves.
What are your thoughts on this matter?
N
NicolasH
22 Sep 2020 10:56
Schematic sewage pipe: municipal sewer via inspection chamber to sewage pipe in the concrete slab.


I have illustrated it here in a simplified way.

1. The municipal sewer at the property boundary was already in place.

2. The sewage pipe and inspection chamber were installed on-site in August.

3. The sewage pipe protruding from the concrete slab was factory-installed.

The slope between points 1 and 3 was only 6cm (2.4 inches) over a distance of 15 meters (49 feet).

Now the general contractor claims that the inspection chamber (2) was not present as a reference point when the concrete slab (3) was poured, and therefore the excessively deep sewer connection does not constitute a defect.
M
matte
22 Sep 2020 11:09
So, what now? Was the pipe and the shaft installed by the builder or by the subcontractor of the general contractor?
I'm slowly getting completely confused...

You do know what "bauseits" means, right?
N
NicolasH
22 Sep 2020 11:14
I think I should start over again...
"Provided by the client" means it does not come from the general contractor (GC).
Musketier22 Sep 2020 11:23
Was there additional excavation done under the slab afterward, and the pipe rerouted? Or how should I imagine the rework?
Does the shaft go further down? Could they have used a different shaft, or does it basically go straight through there?
What does the contractor’s pipe layout plan say?
N
NicolasH
22 Sep 2020 11:27
As I understand it, a lintel was installed behind the frost skirt.
The frost skirt was chiseled out, and the pipe behind it was rerouted upwards, or the lintel was shortened.
Unfortunately, I do not have the pipe layout at the moment.
F
Flocko1
22 Sep 2020 12:57
NicolasH schrieb:


Unfortunately, I don’t have the pipe layout at hand right now.
But there was one?