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Spaßambau18 Apr 2010 17:55Hello everyone,
We are planning to build a 120 sq m (1,292 sq ft) house in September and want to install a rainwater harvesting system. My question is:
How large should the tank be at minimum for garden irrigation (plot size about 700 sq m (7,535 sq ft)) and possibly toilet use, so that the investment is worthwhile and not a waste of money? Our builder suggested 8 m³ (2,113 gallons), but that seems quite large to me.
Has anyone had any experience with this?
Or would it be better to have a large barrel at the gutter (500 liters (132 gallons))?
😕 Help
We are planning to build a 120 sq m (1,292 sq ft) house in September and want to install a rainwater harvesting system. My question is:
How large should the tank be at minimum for garden irrigation (plot size about 700 sq m (7,535 sq ft)) and possibly toilet use, so that the investment is worthwhile and not a waste of money? Our builder suggested 8 m³ (2,113 gallons), but that seems quite large to me.
Has anyone had any experience with this?
Or would it be better to have a large barrel at the gutter (500 liters (132 gallons))?
😕 Help
Hello Spaßambau,
I have looked into this topic as well, but I’m not an expert. 8m³ (283 cubic feet) does seem quite large. We were advised to go with 5-6m³ (177-212 cubic feet). If it’s bigger, the water might not overflow, and floating debris won’t be flushed out, which could cause the water to stagnate. You should also be able to empty the rainwater tank from time to time. Without promoting other websites directly—just search for “size of a rainwater cistern / tank” online; there are several helpful resources with calculation tools.
The key factors are the catchment area that collects the water and the rainfall in your region.
Best regards,
Fido
I have looked into this topic as well, but I’m not an expert. 8m³ (283 cubic feet) does seem quite large. We were advised to go with 5-6m³ (177-212 cubic feet). If it’s bigger, the water might not overflow, and floating debris won’t be flushed out, which could cause the water to stagnate. You should also be able to empty the rainwater tank from time to time. Without promoting other websites directly—just search for “size of a rainwater cistern / tank” online; there are several helpful resources with calculation tools.
The key factors are the catchment area that collects the water and the rainfall in your region.
Best regards,
Fido
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Baufüchse28 Apr 2010 11:53Just out of curiosity: approximately how much would this cost?
Are the costs proportional to the benefits?
Are the costs proportional to the benefits?
Hello..
I have a 12 m3 (15.7 yd3) tank and I believe it can never be too big. Everyone told me it was way too large, that the water would go bad, and so on. I’ve had it for 5 years now and always regularly water the lawn. Never had any problems.
Kind regards, Dieter
Costs for concrete cistern: about 2000 euros
I have a 12 m3 (15.7 yd3) tank and I believe it can never be too big. Everyone told me it was way too large, that the water would go bad, and so on. I’ve had it for 5 years now and always regularly water the lawn. Never had any problems.
Kind regards, Dieter
Costs for concrete cistern: about 2000 euros