loreen1303
2016-05-19 21:46:45
- #1
Hello everyone,
we are just about to submit the building application and our developer claims that we are obliged to plan and implement a backflow prevention system.
As far as we understand, this is clear. What we really cannot understand, however, is why we are not allowed to install a backwater valve for sewage and are allegedly required to install a lifting system.
The situation is as follows:
The plot is completely flat, rainwater is not allowed to be discharged into the sewer system throughout the entire development area but must drain via an infiltration pit. Our ground floor is about 30 cm below the last backwater level in the sewer. The plot/development area is located on top of a hill, so water does not come down from any hill but rather drains quickly.
This means that, in case of an event that might occur every 5 years and the sewer system can no longer handle the rainwater, we are supposed to install a pumping station.
For us, this is clearly a matter for a backwater valve and not a pumping station. This system serves a different purpose for us. Furthermore, this system is not allowed to be built outside the building, so we are supposed to get a flap and a system under the floor slab in the house connection room.
The whole thing is supposed to cost about 7000 euros even without earthworks.
Are we thinking too simply or is the construction company right?
By the way, for the insurance a backflow protection is important. A flap would therefore be sufficient and would certainly achieve the same effect.
Thank you for your opinions
we are just about to submit the building application and our developer claims that we are obliged to plan and implement a backflow prevention system.
As far as we understand, this is clear. What we really cannot understand, however, is why we are not allowed to install a backwater valve for sewage and are allegedly required to install a lifting system.
The situation is as follows:
The plot is completely flat, rainwater is not allowed to be discharged into the sewer system throughout the entire development area but must drain via an infiltration pit. Our ground floor is about 30 cm below the last backwater level in the sewer. The plot/development area is located on top of a hill, so water does not come down from any hill but rather drains quickly.
This means that, in case of an event that might occur every 5 years and the sewer system can no longer handle the rainwater, we are supposed to install a pumping station.
For us, this is clearly a matter for a backwater valve and not a pumping station. This system serves a different purpose for us. Furthermore, this system is not allowed to be built outside the building, so we are supposed to get a flap and a system under the floor slab in the house connection room.
The whole thing is supposed to cost about 7000 euros even without earthworks.
Are we thinking too simply or is the construction company right?
By the way, for the insurance a backflow protection is important. A flap would therefore be sufficient and would certainly achieve the same effect.
Thank you for your opinions