ᐅ Cistern Dimensions – Building Plan Tips

Created on: 1 Jul 2016 15:22
M
McEgg
Hello,
I have a question regarding the offered cistern. Our development plan states the following:
C 3. Water Management
C 3.1 The hardening of open areas should be limited to a minimum. Parking spaces and driveways should be paved with permeable surfaces (e.g., grass pavers, paving with grass joints, gravel turf, or similar).
C 3.2 The uncontaminated rainwater collected on private properties must be retained on the site and infiltrated or used as non-potable water.
Only wastewater must be directed to the sewage treatment plant.
C 3.3 A management concept must be developed and coordinated with SGD Süd, RS WAB, Neustadt for the disposal/use of rainwater that is not significantly polluted.

The general contractor suggested that we install a cistern in the garden.
The current offer includes a cistern with a capacity of 4,000 liters (1,057 gallons).
The plot is approximately 540 m² (5,813 sq ft) in total. The house will be roughly 10 m x 11 m (33 ft x 36 ft), plus a double garage of 6 m x 6 m (20 ft x 20 ft), and a terrace...
Do you think this size is too small?
M
meister keks
9 Feb 2018 11:40
Very good.
It definitely makes sense to collect and use the water efficiently if you have to let it infiltrate anyway.
With 6000 liters (1585 gallons), you can get quite far.
I have connected the gutters from my terrace myself.
Even if it rains briefly and lightly, you still have enough water.
8
86bibo
9 Feb 2018 12:00
How was the infiltration handled?

If you already have the 6m³ (7.85 yd³) cistern, I would wait before installing the well. If you notice that you're running out of water, you can always have the well drilled later.
McEgg9 Feb 2018 12:37
As mentioned earlier, a very large area was excavated, and the entire space around the cistern was filled with gravel. The overflow water then drains to this area.
C
Changeling
13 Feb 2018 09:17
Joedreck schrieb:
Just for my information: are garden wells no longer popular, or are they not allowed in many municipalities?
In my older residential area, they are found almost exclusively. That’s why I find this surprising.

We currently have a well and find it fantastic (it is also connected to the toilet flush via a domestic water system). In summer, we have unlimited free water for the garden. We would love to have one again, but where we are building, the groundwater is so deep that it is no longer cost-effective. That’s why we are using a rainwater tank.

We were also told that it wouldn’t be worth connecting the rainwater tank to the toilet flush because the additional pipes would cost more than the water savings. However, I don’t have any figures to support that.
McEgg schrieb:
A 6,000-liter (1,585-gallon) concrete rainwater tank is already installed and connected to the gutters.

May I ask roughly how much that cost? So, the tank, excavation work, and connection?
McEgg13 Feb 2018 10:00
The total comes to €4,600.
andimann13 Feb 2018 13:31
Hello,
McEgg schrieb:
All together 4,600 €.

That’s official… for that amount, I could get about 2,500 m³ (2,760 yd³) of fresh water here. I won’t need that much in my garden in my lifetime…

But okay, for you it was a mandatory requirement. Here it’s exactly the opposite. Even if you have a cistern, it is required to connect the overflow to the sewage system, and then you pay the full stormwater fees. Completely crazy…

Regards,
Andreas