Hello!
We are currently planning a house; the land has been purchased, and we are now working on the preliminary plans. The plot is a corner lot that slopes downward slightly from the street. At the back, it is about 70cm (28 inches) lower than the front at the street. Where the house will be located, it is roughly 40cm (16 inches) lower.
For determining the backflow level, some values were used that require the house to be built higher than the manhole cover at the street level. This means the house needs a substantial raised foundation, plus the floor structure, resulting in steps everywhere on what feels like a flat lot and a large difference between the finished floor level and the current ground level, i.e., the garden.
Question: Are there no alternative ways to address the backflow level requirement? What do you do when the street is at the top and the land slopes steeply downward? The house can’t really be built higher than the street level in that case, right?
This seems odd to me. It involves significant costs for fill material, civil engineering work, steps, and also additional filling for terraces, etc., which in our case leads to an unattractive appearance as well.
Thank you and best regards
We are currently planning a house; the land has been purchased, and we are now working on the preliminary plans. The plot is a corner lot that slopes downward slightly from the street. At the back, it is about 70cm (28 inches) lower than the front at the street. Where the house will be located, it is roughly 40cm (16 inches) lower.
For determining the backflow level, some values were used that require the house to be built higher than the manhole cover at the street level. This means the house needs a substantial raised foundation, plus the floor structure, resulting in steps everywhere on what feels like a flat lot and a large difference between the finished floor level and the current ground level, i.e., the garden.
Question: Are there no alternative ways to address the backflow level requirement? What do you do when the street is at the top and the land slopes steeply downward? The house can’t really be built higher than the street level in that case, right?
This seems odd to me. It involves significant costs for fill material, civil engineering work, steps, and also additional filling for terraces, etc., which in our case leads to an unattractive appearance as well.
Thank you and best regards
Hello,
Neither a backflow valve nor the depth of the municipal sewage pipe is relevant in this case.
All wastewater connections located below the backflow level, which is the manhole cover of the inspection chamber, must be drained via a lifting station.
All other statements are incorrect!
For example, the bathroom on the upper floor would then not be routed through the lifting station and would therefore remain fully functional even if the station fails.
Olli
Neither a backflow valve nor the depth of the municipal sewage pipe is relevant in this case.
All wastewater connections located below the backflow level, which is the manhole cover of the inspection chamber, must be drained via a lifting station.
All other statements are incorrect!
For example, the bathroom on the upper floor would then not be routed through the lifting station and would therefore remain fully functional even if the station fails.
Olli
B
Bieber081512 Feb 2017 00:15No backwater valve? What happens during heavy rain?
B
Bieber081514 Feb 2017 17:22wrobel schrieb:
If the backwater level is below the lowest wastewater connection, nothing needs to be done. I had understood the original question to mean that this condition was not met.B
Bieber081515 Feb 2017 08:51I am completely confused by now!
1. The (lowest) wastewater outlet of the house is located below the backwater level.
2. A lifting station (sump pump system) is required.
3. Is a backwater valve also necessary?
1. The (lowest) wastewater outlet of the house is located below the backwater level.
2. A lifting station (sump pump system) is required.
3. Is a backwater valve also necessary?
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