Development: Choose the location of the sewer channel

Hello everyone,

in the meantime, we are proud landowners and the development is slowly taking shape. We have now learned that the sewage pipe in the west (indicated in green on the sketch) is to be connected from our cul-de-sac.

Mentally, I picture our house standing in the east to be away from the main road and so that the garden lies in the west. My idea was therefore to move the pipe further east so that the gap from the house to the pipe is smaller later on.

However, I was then made to understand that the pipe would lie higher there because it slopes from east to west. This could be relevant because we want to build with a basement and also plan a WC/shower. In the west, the pipe would be at -3.95m, further east it would be "only" (?) at -3.10 to -3.20m deep. Currently, I could still influence the location of the pipe, afterwards I have to live with it.

Should I simply leave the pipe in the west as it is? How expensive/difficult is it if you have a bigger gap? The other utilities (electricity/water) I will also leave there?

Or should I have the sewage pipe laid further into the cul-de-sac? Could the missing centimeters then later cause problems in the basement, so that I inevitably need a lifting station?

Maybe this is also important: The whole new development slopes down from south to north!

What experiences have you had with this? Unfortunately, we have not yet engaged a fixed architect/general contractor to ask. :-/

Thanks in advance.

Good morning

Since the lowest drainage is certainly below the backwater level, a lifting system is necessary anyway. I would place the inspection shaft approximately at l.

Olli

Where is the difference whether the channel would be extended further into the dead-end street and thus be higher or whether it ends at the marked spot, lying deeper there, but then the channel on your private property must have the necessary slope accordingly? If you have to pay for both options entirely out of your own pocket, I see no difference. A lifting system should be provided if a toilet is planned downstairs. Unfortunately probably not a bargain.

Hello,

first of all, thank you for the answers.

My thought was that it would certainly be very expensive if the sewer is on the "wrong side" and then all media have to be routed "across" the property to the house.

Obviously, the costs for a few meters are probably manageable, so it hardly matters. And regarding the slope, it apparently is not a big problem either, since the sewer would still be deep enough when laid. At least, that was the information from the friendly caseworker from the city. He said that for a toilet in the basement only a backwater valve would be required.

I think I will have the connection laid in the middle and hope that it won't come back to haunt me later....

He said that for a toilet in the basement only a backflow flap is required.

Maybe a professional should respond to that again, but I don't believe it. How are the solids supposed to overcome gravity? You need a lifting system to lift the wastewater above the backwater level. For blackwater (toilet, toilet paper, etc.) it is a "proper" lifting system, which costs four digits. Greywater (shower water, hand basin) can be managed with a small lifting system, which costs one digit less.

Hello,

first of all, thanks for the answers.

He said that only a backwater valve is required for a toilet in the basement.

Good morning

This statement is incorrect.

Olli