ᐅ Combine cistern and rainwater inspection chamber?

Created on: 3 Apr 2022 20:00
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Seb_Opf
Good evening,

according to the zoning plan, a cistern must be built on the property. The drainage is carried out via a separate system.

So, two manholes and a cistern are required. From a technical point of view, is it possible to combine the rainwater inspection chamber and the cistern into a single structure to save some effort, or can I skip calling the authorities?

Thank you
S
Seb_Opf
3 Apr 2022 21:22
Attached is an excerpt from the development plan...
If I want to use water from the cistern for garden irrigation, do I need to install a second meter?

Page with text about rainwater use, supply and drainage pipes, groundwater, and runoff.


Document on wastewater disposal: foul water and rainwater as well as rainwater retention.
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TmMike_2
3 Apr 2022 21:27
And then you remember why building is so expensive 😀
These cisterns are the first useless 3,000 (1,864) costs 😀 and then you still have to pay for your expensively collected water.
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hanse987
3 Apr 2022 21:50
Seb_Opf schrieb:

If I want to use water from the cistern for garden irrigation, do I need to install a second meter?

To me, it sounds like you need the meter if you use the water, for example, for the toilet flushing. In that case, it's important to record the water volume because of wastewater charges. I would recommend asking for clarification.
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Seb_Opf
3 Apr 2022 21:55
I wasn’t aware of the double numbers thing until now... Too bad :/

Then I’ll ask about the combination of the inspection chamber / manhole and the cistern, as well as the meter, since I only want to water the garden.
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WilderSueden
3 Apr 2022 22:11
hanse987 schrieb:

To me, it sounds like you need the meter if you use the water, for example, for the toilet flushing. It’s important to record the water volume for wastewater charges. I would ask about it.
That’s definitely the case. Usually, the wastewater volume equals the fresh water volume, and that generally matches up well. Sure, the beer comes into the house in bottles and goes out through the sewer, but that doesn’t really matter. However, if you operate the washing machine and toilet with that water, it changes the situation somewhat.
I would ask again about the retention volume. Six cubic meters (cbm) seems quite a lot to me; if you want a combined cistern, you’re looking at at least 10 cubic meters (cbm).
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Seb_Opf
3 Apr 2022 22:17
A combined cistern means an inspection shaft and cistern in one?

In the last development area, 8 cubic meters (8,000 liters) were still required... I don't think smaller is feasible.