Use of lifting systems to dispose of black water

Dear Forum Users

We are about to make the decision to purchase land and a house

The canal bottom is currently at 289.5.
The house, located 46 meters from the development point, is supposed to be at 291 with the ground floor slab

To my understanding, a lifting system is indispensable here - how can this be determined or calculated in order to get a detailed understanding

With slope, frost depth, tolerance, and nominal diameter, I have come to a theoretical necessary house height of 292.5 meters to avoid a lifting system. Now I have also learned that the backwater level plays a role
How can I determine this or how should it be integrated or considered?

Thanks in advance Regards and thanks

In the large online encyclopedia it states: "The street surface edge at the connection point of the property drainage sewer is considered the authoritative backwater level, unless otherwise specified by the responsible sewer authorities."

How can I determine this or how is it to be integrated or taken into account?

What suggestions did the house planner make? Then you don't need to determine anything at all, because the professional is paid for that ;)

We are about to make the decision to buy land and a house

The OP probably wants to first see if the plot with all its circumstances is "affordable" for him...

How can I determine this or how is it to be integrated or considered?

This was also an issue with our house construction. The backwater level is the manhole cover + 50 cm. We are below the backwater edge and therefore have a Staufix tank hanging in the wastewater pipe. This protects against backflow with electronic flaps but simultaneously pumps wastewater out of the house over the closed flaps if necessary. This way, the house can still be used even if the flaps are closed due to backwater. Of course, this must be approved in the drainage plan by the city.

If I roughly calculate it, everything should work without a lifting system for you as well:
Sewer invert level: 289.5 m
House ground floor: 291 m
Covering due to frost protection: 0.8 m
Pipe diameter DN100: 0.1 m
Minimum slope for DN100: 1%
Distance from house to sewer: 46 m

291 m - 289.5 m - 0.8 m - 0.1 m = 0.6 m (so 0.7 m height is available for the wastewater pipe)
0.6 m / 46 m = 0.013 m/m or 1.3 cm/m (corresponding to 1.3% slope, which is above the minimum slope)
291 m - 289.5 m = 1.5 m (thus the house is clearly above the required backwater level of 0.5 m)

The estimation only works if the drainage is done at the ground slab level on the ground floor and not somewhere in a basement that may not have been mentioned. The top edge of the pipe at the house is also 0.8 m below the ground. Depending on the place of residence, a little more may need to be added here.

Thanks already for the info - I definitely want to avoid having a pump system for the main wastewater. For the washing machine in the basement I don't care, but I don't want to have to pump rainwater (with the current extreme rain) and the water from the ground and upper floors.

That means I am still looking for the highest shaft cover with outlet..... I am already very, very grateful to you all.

- thanks already for the info.... Possibly it would also be an option to raise the house a bit more...