ᐅ Waste lifting station for a 150-meter-long wastewater pipe (or drainage pipe)
Created on: 23 Feb 2019 08:55
M
mazzo0412M
mazzo041223 Feb 2019 08:55Hello everyone,
We bought an old, great house at a very good price. Since the municipality has already provided a water connection and a sewage connection at the property, we are required to connect to them.
The distance from the municipal connections (at the street) is about 150 meters (490 feet), so this length needs to be installed on our private land.
The first quote was around 50,000 euros (all included), so we are currently looking for a better solution.
The problem with the sewage line is that it lies 3 meters (10 feet) deep, with a lot of groundwater present, which results in significant work such as excavation. According to the contractor, the slope would be sufficient (the house is built on a slab and is 50cm (20 inches) lower than the street in front, where the municipal connection is at 3 meters (10 feet) depth). After leveling, it turned out that we achieve exactly a 1% slope.
Now my alternative considerations and question to you:
1. If I install a sewage lifting unit with a macerator (of course a stronger model, costing about 5,000 euros) in the old three-chamber septic tank and then discharge the wastewater/sewage into the public sewage system via a 50mm (2 inch) PE pipe over the 150 meters (490 feet), is that possible?
2. In that case, the pressure-driven sewage pipe could be buried at about 1 to 1.2 meters (3 to 4 feet) depth and then connected to the municipal connection, which is 3 meters (10 feet) deep, within a transfer shaft at the street. This would mean no need to maintain the leveling, and the trench would be much smaller. We could also relocate the fresh water line slightly higher and place it above the sewage pipe, in the same trench. Or am I completely wrong here?
3. Or should I apply for permission from the municipality to use a sewage pit?
4. Or do you have another idea? What do you think of the offer (maybe it’s an "anchor offer")?
Thank you very much!
We bought an old, great house at a very good price. Since the municipality has already provided a water connection and a sewage connection at the property, we are required to connect to them.
The distance from the municipal connections (at the street) is about 150 meters (490 feet), so this length needs to be installed on our private land.
The first quote was around 50,000 euros (all included), so we are currently looking for a better solution.
The problem with the sewage line is that it lies 3 meters (10 feet) deep, with a lot of groundwater present, which results in significant work such as excavation. According to the contractor, the slope would be sufficient (the house is built on a slab and is 50cm (20 inches) lower than the street in front, where the municipal connection is at 3 meters (10 feet) depth). After leveling, it turned out that we achieve exactly a 1% slope.
Now my alternative considerations and question to you:
1. If I install a sewage lifting unit with a macerator (of course a stronger model, costing about 5,000 euros) in the old three-chamber septic tank and then discharge the wastewater/sewage into the public sewage system via a 50mm (2 inch) PE pipe over the 150 meters (490 feet), is that possible?
2. In that case, the pressure-driven sewage pipe could be buried at about 1 to 1.2 meters (3 to 4 feet) depth and then connected to the municipal connection, which is 3 meters (10 feet) deep, within a transfer shaft at the street. This would mean no need to maintain the leveling, and the trench would be much smaller. We could also relocate the fresh water line slightly higher and place it above the sewage pipe, in the same trench. Or am I completely wrong here?
3. Or should I apply for permission from the municipality to use a sewage pit?
4. Or do you have another idea? What do you think of the offer (maybe it’s an "anchor offer")?
Thank you very much!
C
chriz081527 Feb 2019 21:34Hello,
which pipe material and nominal diameter were offered?
At €50,000 it can almost only be copper :-)
To answer your questions, I would need more information.
In which federal state / region is the pipeline supposed to be installed?
What is the soil condition? Are demolition or cutting works necessary for the installation, or is it open green field?
From my point of view, the offer seems very exaggerated for a standard installation, based on a PVC-U pipe installation nominal diameter 100mm (4 inches) (material about €3 per meter (3.3 yards)) – nominal diameter 150mm (6 inches) (€5 per meter (3.3 yards)).
For 150 meters (164 yards), the material cost would be about €1,000 including fittings.
Where do the high costs in the offer come from?
I would avoid a lifting station, as the effort for pipe installation is also quite high since the pressure pipe must also be installed frost-free. Additionally, there are the energy consumption, installation costs, maintenance and servicing, and the risk in case of system failure if you cannot repair it yourself. I do not even want to mention the risk of misuse of the sewage lifting station, which can cause blockages or damage to the system or pressure pipe.
The idea of a holding tank might not be that wrong compared to the €50,000 for pipeline installation.
Of course, it must be taken into account that the vacuum tanker must be able to drive close to the tank, so access and load-bearing capacity of the driveway for heavy vehicles at regular intervals are important considerations.
The tank should not be installed too far from the house either, as otherwise the costs for pipe installation will increase again.
It is also important to find a reliable waste disposal service. When the tank is full, using the shower, toilet, sink, etc. is not possible, but this can be managed.
Water protection zones and, if necessary, securing the tank against buoyancy might significantly increase costs and complexity, but this can certainly be clarified in advance with a preliminary offer.
Regards,
Chriz
which pipe material and nominal diameter were offered?
At €50,000 it can almost only be copper :-)
To answer your questions, I would need more information.
In which federal state / region is the pipeline supposed to be installed?
What is the soil condition? Are demolition or cutting works necessary for the installation, or is it open green field?
From my point of view, the offer seems very exaggerated for a standard installation, based on a PVC-U pipe installation nominal diameter 100mm (4 inches) (material about €3 per meter (3.3 yards)) – nominal diameter 150mm (6 inches) (€5 per meter (3.3 yards)).
For 150 meters (164 yards), the material cost would be about €1,000 including fittings.
Where do the high costs in the offer come from?
I would avoid a lifting station, as the effort for pipe installation is also quite high since the pressure pipe must also be installed frost-free. Additionally, there are the energy consumption, installation costs, maintenance and servicing, and the risk in case of system failure if you cannot repair it yourself. I do not even want to mention the risk of misuse of the sewage lifting station, which can cause blockages or damage to the system or pressure pipe.
The idea of a holding tank might not be that wrong compared to the €50,000 for pipeline installation.
Of course, it must be taken into account that the vacuum tanker must be able to drive close to the tank, so access and load-bearing capacity of the driveway for heavy vehicles at regular intervals are important considerations.
The tank should not be installed too far from the house either, as otherwise the costs for pipe installation will increase again.
It is also important to find a reliable waste disposal service. When the tank is full, using the shower, toilet, sink, etc. is not possible, but this can be managed.
Water protection zones and, if necessary, securing the tank against buoyancy might significantly increase costs and complexity, but this can certainly be clarified in advance with a preliminary offer.
Regards,
Chriz
M
mazzo041228 Feb 2019 08:47On site, based on his sketches and notes in his head, he estimated that we would come to about 25,000 euros gross – then the quote arrived at 45,000 euros. So, what can you say to that…..????
(It is a huge company that probably already has fully booked order books)
But as a layperson, I still see one thing:
If I have to dig 3 meters deep (10 feet) and lay sewer pipes in sand with a slope, possibly have to pump out water due to a flood zone, install formwork, and set five large manholes in total, then it’s obvious that a pressure sewer system will be much cheaper.
Sure, a lifting station is required – but there are low-maintenance systems available. Besides, there is already a large three-chamber septic tank present, which I want to have cleaned, and install the compact lifting station (e.g. with a 115-liter (30-gallon) tank) inside it.
Or am I oversimplifying this?
Thank you
(It is a huge company that probably already has fully booked order books)
But as a layperson, I still see one thing:
If I have to dig 3 meters deep (10 feet) and lay sewer pipes in sand with a slope, possibly have to pump out water due to a flood zone, install formwork, and set five large manholes in total, then it’s obvious that a pressure sewer system will be much cheaper.
Sure, a lifting station is required – but there are low-maintenance systems available. Besides, there is already a large three-chamber septic tank present, which I want to have cleaned, and install the compact lifting station (e.g. with a 115-liter (30-gallon) tank) inside it.
Or am I oversimplifying this?
Thank you
A 1% slope is not much, so the work has to be done very precisely and maintained consistently. This applies to a distance of 150 meters (500 feet), which also means 150 potential meters (feet) where settling can occur. As soon as even a small section settles over time, it will repeatedly cause blockages.
At that point, you can only hope that some maintenance access points were installed to allow for cleaning with a high-pressure cleaner. For 150 meters (500 feet), otherwise, you would need to hire a professional company.
At that point, you can only hope that some maintenance access points were installed to allow for cleaning with a high-pressure cleaner. For 150 meters (500 feet), otherwise, you would need to hire a professional company.
C
chriz081528 Feb 2019 18:17It's a pity you didn’t answer the questions, as that makes it hard to assess.
.. Right, I forgot the inspection shafts, one every 20 meters (about 66 feet), costing roughly another 1500€ each just for materials.
We’re looking at 3000€ - 4000€ for materials, and the pipe will only be at a depth of 3 meters (about 10 feet) at the end. At the beginning, you can probably lay the pipe more easily and therefore more cheaply without the complex measures described above...
The open questions remain, of course.
Best regards, Chriz
.. Right, I forgot the inspection shafts, one every 20 meters (about 66 feet), costing roughly another 1500€ each just for materials.
We’re looking at 3000€ - 4000€ for materials, and the pipe will only be at a depth of 3 meters (about 10 feet) at the end. At the beginning, you can probably lay the pipe more easily and therefore more cheaply without the complex measures described above...
The open questions remain, of course.
Best regards, Chriz
M
mazzo04127 Mar 2019 20:18Hello Chriz,
which specific questions did you mean that are still open?
Next week, I will receive a quote for a 50mm (2 inch) pressure pipe, a 32mm (1¼ inch) drinking water pipe, a conduit for internet cables, and the installation of a lifting station in the existing sewage pit.
The company will install a 3-meter (10 feet) deep sewage handover shaft by the street and will lay the pipes using a trench cutter.
I’m curious and will keep you updated.
(For me, the question remains which type of lifting station I need, and among other things, whether it should have a macerator or not??? Who can answer or calculate this for me??)
Thank you
which specific questions did you mean that are still open?
Next week, I will receive a quote for a 50mm (2 inch) pressure pipe, a 32mm (1¼ inch) drinking water pipe, a conduit for internet cables, and the installation of a lifting station in the existing sewage pit.
The company will install a 3-meter (10 feet) deep sewage handover shaft by the street and will lay the pipes using a trench cutter.
I’m curious and will keep you updated.
(For me, the question remains which type of lifting station I need, and among other things, whether it should have a macerator or not??? Who can answer or calculate this for me??)
Thank you
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