Hello everyone,
We are currently working on building our single-family house. The building application has been submitted, and we promptly received the first letter from the building authority stating:
Rainwater must generally be infiltrated or directed into a nearby open water body, as long as this is possible without excessive effort and damage (§ 48 b Abs. 3 WG-BW).
After a phone consultation with the building authority, we were told that rainwater is not allowed to be discharged into the sewer system due to water protection zone III. The proposed solution (if you can call it that, as they basically said “there’s no way around it”) is a cistern. Permeable paving was also mentioned for the driveway, although we’re not sure what that is for. There is no water body nearby, by the way.
We had actually considered a cistern for watering the garden but excluded it due to the cost. Now we are being forced to install one despite the financial strain, so I have a question for you.
There seem to be countless types of cisterns (according to Google). Can you tell me which type would suit our purpose and where it’s most important not to cut corners?
Kind regards
We are currently working on building our single-family house. The building application has been submitted, and we promptly received the first letter from the building authority stating:
Rainwater must generally be infiltrated or directed into a nearby open water body, as long as this is possible without excessive effort and damage (§ 48 b Abs. 3 WG-BW).
After a phone consultation with the building authority, we were told that rainwater is not allowed to be discharged into the sewer system due to water protection zone III. The proposed solution (if you can call it that, as they basically said “there’s no way around it”) is a cistern. Permeable paving was also mentioned for the driveway, although we’re not sure what that is for. There is no water body nearby, by the way.
We had actually considered a cistern for watering the garden but excluded it due to the cost. Now we are being forced to install one despite the financial strain, so I have a question for you.
There seem to be countless types of cisterns (according to Google). Can you tell me which type would suit our purpose and where it’s most important not to cut corners?
Kind regards
TmMike_2 schrieb:
I had a deep well drilled through a contact.Good for you. Unfortunately, we live in a water protection area, so drilling a well is not an option for us. Not everything has to make immediate economic sense; it helps us and complies with our city’s regulations.
And yes, it probably looked similar for us too. However, our house was already built, and I couldn’t take a picture from above... 😉
W
WilderSueden17 Mar 2022 16:30TmMike_2 schrieb:
I always wonder if it’s economically worthwhile.Compared to a well, I’m not sure. Compared to tap water, definitely, since usually the volume of fresh water equals the volume of wastewater, plus you don’t have to treat water for the garden extensively. Also, with the cistern, you save a few more dollars on rainwater.For us personally, it’s certainly more worthwhile than a well because the development plan requires a 3.5 cubic meter (about 123 cubic feet) retention cistern. You might as well make the hole a bit larger and not just bury air.
WilderSueden schrieb:
Compared to tap water, definitely yes, since usually fresh water equals wastewater, and besides, you don’t need complex treatment for garden water. Not necessarily, if you install separate meters for garden water and don’t pay for wastewater.
From a cost perspective, this balances out, and you can water quite a lot before the costs for a cistern pay off (actually, probably never!?).
WilderSueden schrieb:
And with the cistern, you also save a few euros on stormwater. At least in many municipalities, a cistern does not replace a soakaway, so the latter still needs to be built in addition!
W
WilderSueden17 Mar 2022 16:44Fortunately, our municipality decided against it. The permeable paving is already quite demanding, as the subsoil absorbs water at a rate two orders of magnitude lower than the paving installed on top.
O
Oetzberger17 Mar 2022 17:19TmMike_2 schrieb:
I had a deep well drilled through a contact.How much did the drilling cost you? Was it mostly done by yourself? Or with heavy machinery?Oetzberger schrieb:
How much did the drilling cost you? Was it mostly DIY or done with heavy machinery?I wanted drinking water quality. Here, there is a coal layer starting at 13m (43 feet), followed by water containing iron and manganese. A 5" (12.7 cm) pipe, 12.5m (41 feet) deep, with filter, pump, and everything cost 1500€.
Construction water alone would have cost me 650€, so I decided to have a well drilled right away.
Heavy machinery—sort of. But without proper tools, you can’t dig a hole like that; it would just keep collapsing.
I used a tractor, 8m3 (280 cubic feet) of water, a decent pump, and a drilling rig.
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