Hello everyone,
I want to start working on the rainwater drainage system.
The downpipes will extend down to the ground level or 10 cm (4 inches) into the soil. I have a total of five downpipes. I plan to divide these into three underground drainage lines according to the roof areas and the corresponding amount of rainwater. The pipes running directly along the house, up to about 3 meters (10 feet) from the building, will be made of standard sewer pipes (KG pipes). Beyond that point, I will use drainage pipes wrapped either with a coconut fiber covering or with a geotextile fleece. The drainage pipes will be about 30 meters (98 feet) long to allow the water to infiltrate. After that is the property boundary.
I did some research online, but I couldn’t really find my specific approach. Surprisingly, some recommend laying the drainage pipe directly around the house. But wouldn’t that direct all the water back to or into the house? Most others use a rainwater harvesting tank (cistern), an infiltration tank, or connect the system to the municipal sewer network. The latter is not allowed in my case.
I don’t need a cistern because I will be drilling a garden well anyway.
Installing a dedicated infiltration tank seems to be much more expensive.
Has anyone here solved this in a similar way to what I’m planning?
I want to start working on the rainwater drainage system.
The downpipes will extend down to the ground level or 10 cm (4 inches) into the soil. I have a total of five downpipes. I plan to divide these into three underground drainage lines according to the roof areas and the corresponding amount of rainwater. The pipes running directly along the house, up to about 3 meters (10 feet) from the building, will be made of standard sewer pipes (KG pipes). Beyond that point, I will use drainage pipes wrapped either with a coconut fiber covering or with a geotextile fleece. The drainage pipes will be about 30 meters (98 feet) long to allow the water to infiltrate. After that is the property boundary.
I did some research online, but I couldn’t really find my specific approach. Surprisingly, some recommend laying the drainage pipe directly around the house. But wouldn’t that direct all the water back to or into the house? Most others use a rainwater harvesting tank (cistern), an infiltration tank, or connect the system to the municipal sewer network. The latter is not allowed in my case.
I don’t need a cistern because I will be drilling a garden well anyway.
Installing a dedicated infiltration tank seems to be much more expensive.
Has anyone here solved this in a similar way to what I’m planning?
What you found while googling shows how a drainage pipe is actually used—not to let water seep away around the house, but to collect and channel water.
Your idea won’t work; after two years, everything will be clogged, and water will start overflowing from the downspouts.
A soakaway chamber or, in areas with high groundwater, a soakaway basin or soakaway crates.
Your idea won’t work; after two years, everything will be clogged, and water will start overflowing from the downspouts.
A soakaway chamber or, in areas with high groundwater, a soakaway basin or soakaway crates.
Lumpi_LE schrieb:
What you found while googling is actually how a drainage pipe is supposed to be used—not to allow water to infiltrate around the house, but to collect and redirect water.
Your idea won’t work; after two years, the pipes will be clogged, and water will start coming out of the downspouts at the top.
Use a soakaway chamber or, if the groundwater level is high, a infiltration basin or infiltration crates.I did it exactly like that, and after 3.5 years, we’ve never had water come out of the downspouts or the connection pipe at the house... and we definitely don’t have highly permeable sandy soil.
However, we buried a rainwater barrel at each end of a section of the drainage line as a buffer in case of heavier rainfall.
There is a lot of dirt in the rainwater that comes off the roof, judging by what ends up in the filter before our cistern. Basti’s rain barrel already catches a lot of it.
If I Google it, a soakaway tunnel costs about €250, which has roughly the same infiltration capacity as 50m (164 feet) of DN 100 (4 inch) drainage pipe. And €250 would be considered a negligible amount for a house worth around half a million.
A rain barrel that is open at the bottom is ultimately no different from a soakaway pit.
If I Google it, a soakaway tunnel costs about €250, which has roughly the same infiltration capacity as 50m (164 feet) of DN 100 (4 inch) drainage pipe. And €250 would be considered a negligible amount for a house worth around half a million.
A rain barrel that is open at the bottom is ultimately no different from a soakaway pit.
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