ᐅ Is it possible to install wastewater drainage in the basement?
Created on: 11 Jan 2016 15:14
W
world-e
Hello,
I am planning to build a new single-family house with a basement. My question is whether it is possible to drain the wastewater from the basement directly into the sewer system without the need for a lifting station. Specifically, I am wondering if the sewer is deep enough. The basement is planned to have a clear height of 2.5 to 2.7 meters (8.2 to 8.9 feet), and the basement ceiling should be at ground level. However, I cannot determine this from the sewer plan (126/7). It would be great if someone could help me with this and explain a bit. Are any other details needed? This is only a cross-section from the zoning plan, not from my house.
Thank you very much
I am planning to build a new single-family house with a basement. My question is whether it is possible to drain the wastewater from the basement directly into the sewer system without the need for a lifting station. Specifically, I am wondering if the sewer is deep enough. The basement is planned to have a clear height of 2.5 to 2.7 meters (8.2 to 8.9 feet), and the basement ceiling should be at ground level. However, I cannot determine this from the sewer plan (126/7). It would be great if someone could help me with this and explain a bit. Are any other details needed? This is only a cross-section from the zoning plan, not from my house.
Thank you very much
B
Bauexperte11 Jan 2016 21:46World-e schrieb:
At what height is the backflow level, and what are the individual specifications? The backflow level is generally at street level.Regards, Bauexperte
Question for clarification:
Is the issue about directing the household wastewater into the sewer, or water that collects from a floor drain in the basement?
Is there a modern sewer system with separate foul and stormwater drainage?
For a floor drain, I can perhaps understand the need for a lifting station due to backwater levels, but not for household wastewater discharged through a closed pipe system. If there is enough slope toward the sewer pipe, the pipes can be run below the basement floor and drain properly. From a purely physical standpoint—though I am not familiar with the regulations on this.
In general, all wastewater pipes leaving a building are buried frost-proof well below street level. However, very few houses have a lifting station. Therefore, I do not understand the statement regarding the backwater level here.
To protect against backflow, check valves can be used and are often recommended or even required.
Is the issue about directing the household wastewater into the sewer, or water that collects from a floor drain in the basement?
Is there a modern sewer system with separate foul and stormwater drainage?
For a floor drain, I can perhaps understand the need for a lifting station due to backwater levels, but not for household wastewater discharged through a closed pipe system. If there is enough slope toward the sewer pipe, the pipes can be run below the basement floor and drain properly. From a purely physical standpoint—though I am not familiar with the regulations on this.
In general, all wastewater pipes leaving a building are buried frost-proof well below street level. However, very few houses have a lifting station. Therefore, I do not understand the statement regarding the backwater level here.
To protect against backflow, check valves can be used and are often recommended or even required.
My question was whether it is possible to install a toilet and shower in the basement without a sewage lifting system, or at least prepare for it. And whether this can be determined using the site elevation plan and the sewer plan. Yes, there are separate sewer systems for wastewater and rainwater.
I don’t see any obstacle as long as the sewer line in the street is deep enough.
In case of heavy rain, there is no risk of basement flooding since the rainwater is drained separately, and there must be no connection between the toilet or shower and the rainwater drainage system. A lifting station would not be necessary in that case.
Unfortunately, I can’t tell from the plan how deep the sewer pipes are laid. I would recommend checking with the responsible authority.
In case of heavy rain, there is no risk of basement flooding since the rainwater is drained separately, and there must be no connection between the toilet or shower and the rainwater drainage system. A lifting station would not be necessary in that case.
Unfortunately, I can’t tell from the plan how deep the sewer pipes are laid. I would recommend checking with the responsible authority.
B
Bauexperte20 Feb 2016 11:42Explosiv schrieb:
Then I wouldn’t see any objection, as long as the sewer line in the street is deep enough. This is always a matter of how "we" see it and how it can actually be implemented in reality. In recent years, I have only overseen 2 construction projects where your approach was permitted; however, these involved gentle slopes. All other projects where a bathroom was planned in the basement had to be drained above the backwater level. This means they had to be designed with a sewage lifting system.
So in any case, double-check in advance what can be approved and under which conditions.
Regards, Bauexperte
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