ᐅ Lifting station or gravity drainage for sewer lines over 40 meters

Created on: 28 Apr 2022 11:26
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Basti09
Hello everyone,
for our new build on a hillside, we need a lifting station to connect to the sewer on the upper street.
Alternatively, it would be possible to connect through the neighboring property to the sewer on the parallel street below the building. However, this would require installing pipes of about 40m (130 feet).

What do you think? Which option makes more sense in terms of costs (purchase and installation/maintenance of the lifting station vs. pipe installation)?
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motorradsilke
28 Apr 2022 14:42
Tolentino schrieb:

It also depends on what kind of property it is and what is already located along the planned pipeline route...
And how much of it actually crosses the neighboring property.
Also to check: over 40m (130 feet) with a 2% slope equals 80cm (31.5 inches). Add another 80cm (31.5 inches) for frost protection, that’s already 1.6m (63 inches). Is the sewer connection still deep enough then? (Usually it is, but better to double-check).

As far as I know, a 1% slope is sufficient for 110mm (4.3 inches) pipes.
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WilderSueden
28 Apr 2022 14:47
Tolentino schrieb:

Also check this: over 40m (131 feet) with a 2% slope equals 80cm (31.5 inches). Add 80cm (31.5 inches) for frost protection, and that already makes 1.6m (63 inches). Is the sewer connection still deep enough then? Usually yes, but better to verify.
Since the neighboring property probably also has a slope, this likely won’t be an issue.
Nida35a29 Apr 2022 15:03
We have approximately 60-70 meters (65-77 yards) of wastewater pipe running under the slab to the sewer. A 100mm (4 inch) pipe with a 1% slope is sufficient.
This is preferable to any solution involving a lifting station, which costs money and requires annual maintenance (it cannot handle individual items like socks).
The slope should be followed precisely, and using the water-saving button on the toilet cistern is not recommended.
Once a year, we empty our cistern to flush the pipe.
There are two inspection openings along the pipeline, which are very useful for waste disposal from motorhomes.
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Obermuh
29 Apr 2022 20:08
If you decide to go across your neighbor’s field, never do so without a secured utility easement recorded in the land registry.

We also bought an old field through which two neighbors drained their houses, both without any registered easement. One was allowed to continue (still without a recorded utility easement and without any real alternative), while the other had to install a pumping station costing a total of €35,000 because the pipeline crossed our building area.