ᐅ Cistern in the garden / driveway

Created on: 31 Jan 2020 22:28
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Piotr1981
We are planning to build or buy a rainwater cistern. Has anyone here had experience with this? The cistern is primarily intended for garden irrigation.
According to the development plan, rainwater infiltration on the property is not allowed.

Concrete?
Plastic?
What else should we consider?
Toilet connection?
Where to position it?

I would like to take this into account directly during the excavation for the foundation slab and have the hole dug at the same time.

Looking forward to your ideas and tips.
kaho6741 Feb 2020 19:38
Yes, the 23,000 liters (6,100 gallons) should be sufficient for an initial firefighting water supply. There are minimum required amounts. One year later, a public 100,000 liters (26,400 gallons) cistern was built directly opposite. Very frustrating, especially since we had offered to share the costs for a public construction project. But I just say "authority."
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Piotr1981
1 Feb 2020 19:39
kaho674 schrieb:

Yes, the 23,000 liters (6,100 gallons) should be enough for an initial firefighting water supply. There are minimum required amounts. One year later, a public 100,000-liter (26,400 gallons) cistern was built directly across the street. Very frustrating, especially since we had offered to share the costs for a public project. But I’ll just say “the authorities.”

Yes, those dear officials at the authorities.
The city already told me that despite the cistern, no exemption from stormwater fees is to be expected. oops:
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Bookstar
1 Feb 2020 19:46
So, to cope well with hot summers, I wouldn’t go below 8,000 liters (2,113 gallons), unless your garden is towel-sized. The expensive part is not the size, but the installation and connection. And for that, the size doesn’t matter!
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Piotr1981
1 Feb 2020 19:57
Bookstar schrieb:

So to cope with hot summers well, I wouldn’t go below 8000 liters (2100 gallons), unless your garden is as small as a towel. The costly part isn’t the size, but the installation and connection. And for that, size doesn’t matter!

How do you define “towel” size in square meters (sqm)? Then I might have an idea.
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Bookstar
1 Feb 2020 20:42
For plots larger than 500m2 (around 5,380 sq ft), I would not install a cistern smaller than 8,000 liters (2,113 gallons). For smaller plots, 5,000 liters (1,321 gallons) is sufficient.
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Piotr1981
1 Feb 2020 20:50
Bookstar schrieb:

For plots larger than 500m2 (5400 sq ft), I wouldn’t install a cistern smaller than 8000 liters (2100 gallons). For smaller plots, 5000 liters (1300 gallons) is sufficient.

Thank you.

I was told that we shouldn’t exceed 5000 liters (1300 gallons) because the cistern must be completely emptied at least once a year due to deposits, etc.
That was the opinion of a professional.
What is your view on this?