ᐅ Backwater pump – Does such a pump take up a lot of space?
Created on: 10 Feb 2017 17:07
K
KlödiblödiK
Klödiblödi10 Feb 2017 17:07Hello everyone,
we are building a single-family house and are currently in the planning phase, just about to finalize the floor plan and prepare the final building permit application. Our planner has now pointed out the following:
"Due to the elevation of the sewage shaft (MW, D 508.90, S 505.68 see site plan)
in the street, we had to plan a sewage pumping station as a
backflow prevention measure for safety reasons."
We are wondering what (MW, D 508.90, S 505.68 see site plan) means. Presumably, these are height references?! But what do D and S stand for? Attached is our site plan. Is this backflow pump really necessary? Since it naturally involves additional (unplanned) costs and surely also maintenance and operating expenses, we would really prefer to avoid such a pump. Are there any alternatives to this kind of pump? Does a pump take up a lot of space? And what is the typical cost for something like this?
Thank you in advance for your help!
Best regards,
The Klödis
we are building a single-family house and are currently in the planning phase, just about to finalize the floor plan and prepare the final building permit application. Our planner has now pointed out the following:
"Due to the elevation of the sewage shaft (MW, D 508.90, S 505.68 see site plan)
in the street, we had to plan a sewage pumping station as a
backflow prevention measure for safety reasons."
We are wondering what (MW, D 508.90, S 505.68 see site plan) means. Presumably, these are height references?! But what do D and S stand for? Attached is our site plan. Is this backflow pump really necessary? Since it naturally involves additional (unplanned) costs and surely also maintenance and operating expenses, we would really prefer to avoid such a pump. Are there any alternatives to this kind of pump? Does a pump take up a lot of space? And what is the typical cost for something like this?
Thank you in advance for your help!
Best regards,
The Klödis
Hello,
Usually, the height level of the sewer in front of your house is considered. D=508.9 means that the manhole cover of the sewer is at 508.9 m above sea level, and in an extreme case, wastewater could back up to this level. If drains, toilets, showers, etc., in your house are located below this level, your house would flood without additional protection if the sewer becomes full.
You can install simple backwater valves, which is theoretically sufficient. However, if they get stuck (ask yourself: will you really disassemble and clean these every six months?), then you have a problem...
I assume you are building with a basement. In that case, wastewater pipes for drains in the basement will likely be below 508.9 m. Wastewater pipes for the ground floor and upper floors would be routed separately outside the house at a higher level, so there is no risk there.
For a reliable solution, you need a pump system (lifting station) for everything in the basement. If you have a toilet there, it gets more complicated; otherwise, a small pump system is not a big deal. It requires about the space of a crate of beer and costs around 300–800 €.
Best regards,
Andreas
Usually, the height level of the sewer in front of your house is considered. D=508.9 means that the manhole cover of the sewer is at 508.9 m above sea level, and in an extreme case, wastewater could back up to this level. If drains, toilets, showers, etc., in your house are located below this level, your house would flood without additional protection if the sewer becomes full.
You can install simple backwater valves, which is theoretically sufficient. However, if they get stuck (ask yourself: will you really disassemble and clean these every six months?), then you have a problem...
I assume you are building with a basement. In that case, wastewater pipes for drains in the basement will likely be below 508.9 m. Wastewater pipes for the ground floor and upper floors would be routed separately outside the house at a higher level, so there is no risk there.
For a reliable solution, you need a pump system (lifting station) for everything in the basement. If you have a toilet there, it gets more complicated; otherwise, a small pump system is not a big deal. It requires about the space of a crate of beer and costs around 300–800 €.
Best regards,
Andreas
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