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?
B
boxandroof18 Apr 2019 15:08Only the soakaway system (21 x 80x80x35) was supposed to cost us 3500-4000 EUR, including all work. However, this was from an expensive company that we ultimately did not hire.
We now have two concrete infiltration chambers, but as far as I know, this is not allowed everywhere.
We now have two concrete infiltration chambers, but as far as I know, this is not allowed everywhere.
When you mention that the infiltration tunnel has an infiltration capacity equivalent to 50 meters of DN100 (4-inch) drainage pipe, are there any general rules of thumb for this? I usually estimate these things roughly. As I said, I would install three drainage pipes with a total length of about 100 meters (330 feet). The pipes are classified by volume: 600, 1800, 3000 liters (about 160, 475, 790 gallons).
What would roughly correspond to 100 meters of DN100 drainage pipe?
Of course, 100 meters will infiltrate water better than a 10-meter (33 feet) soakaway.
Soakaways that I have seen so far usually include an additional inspection chamber (for ventilation?). Is that absolutely necessary? I wouldn’t have done it for the drainage pipe either. I assume the rainfall won’t be so heavy that the DN100 pipe fills completely and prevents air from escaping.
What would roughly correspond to 100 meters of DN100 drainage pipe?
Of course, 100 meters will infiltrate water better than a 10-meter (33 feet) soakaway.
Soakaways that I have seen so far usually include an additional inspection chamber (for ventilation?). Is that absolutely necessary? I wouldn’t have done it for the drainage pipe either. I assume the rainfall won’t be so heavy that the DN100 pipe fills completely and prevents air from escaping.
L
LuckyDuke23 Apr 2019 13:15Hello everyone,
Wrapping coconut fiber tubes or fleece directly around the drainage pipe is actually not optimal and tends to clog. That is why DIN 4095 also excludes this method. The drainage pipes should be laid in a gravel drainage bed, which in turn must be embedded all around in a geotextile fabric. But never wrap the pipe itself!
A well-known home improvement chain has a good video showing how to do the job correctly.
Best regards
Wrapping coconut fiber tubes or fleece directly around the drainage pipe is actually not optimal and tends to clog. That is why DIN 4095 also excludes this method. The drainage pipes should be laid in a gravel drainage bed, which in turn must be embedded all around in a geotextile fabric. But never wrap the pipe itself!
A well-known home improvement chain has a good video showing how to do the job correctly.
Best regards