ᐅ French drains without ventilation or with ventilation?
Created on: 18 May 2022 20:35
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Coletrickle_7808C
Coletrickle_780818 May 2022 20:35I hope I’m posting this in the right thread.
Today, I had a conversation with two neighbors (new development area).
It was about the topic of infiltration trenches (mandatory infiltration according to the development plan).
All three of us have an infiltration trench. However, the two neighbors have a vent, and mine is without one, with the understanding that a vent is necessary to ensure water flows properly into the trench and can infiltrate.
Also, our inspection chambers are different. The neighbors’ chambers basically look directly into the infiltration trench. Mine does not. Here, you see two pipes coming from the house, and the infiltration pipe starts slightly higher up.
So my questions are: Has something been done improperly with mine? Is a vent necessary?
Today, I had a conversation with two neighbors (new development area).
It was about the topic of infiltration trenches (mandatory infiltration according to the development plan).
All three of us have an infiltration trench. However, the two neighbors have a vent, and mine is without one, with the understanding that a vent is necessary to ensure water flows properly into the trench and can infiltrate.
Also, our inspection chambers are different. The neighbors’ chambers basically look directly into the infiltration trench. Mine does not. Here, you see two pipes coming from the house, and the infiltration pipe starts slightly higher up.
So my questions are: Has something been done improperly with mine? Is a vent necessary?
What diameter are your pipes?
Ventilation is needed when the expected water volume almost completely fills the pipe, because then the escaping air from the infiltration trench may push against the incoming water. Maybe they only have DN 80, and you have DN 125? And how often do you experience heavy rainfall events?
I don’t understand the other supposed "problem"; often a picture helps more than a thousand words.
Ventilation is needed when the expected water volume almost completely fills the pipe, because then the escaping air from the infiltration trench may push against the incoming water. Maybe they only have DN 80, and you have DN 125? And how often do you experience heavy rainfall events?
I don’t understand the other supposed "problem"; often a picture helps more than a thousand words.
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Coletrickle_780819 May 2022 09:09No idea. Attached is a picture.
The location is Eilenburg near Leipzig.
The location is Eilenburg near Leipzig.
Okay, I’m no expert, but this seems off to me.
1. To me, this is not a soakaway but rather an infiltration shaft. From your description, I understand that the rainwater from your house roof first flows into this shaft, and then, if the volume exceeds the shaft’s capacity, it flows into a soakaway?
2. In my opinion, the supply pipes should be positioned higher to prevent backflow. The pipe leading to the soakaway should be the lowest, so that any water exceeding the shaft’s capacity flows into the soakaway.
But honestly, I’m not an expert on this, so others should provide the final answer.
1. To me, this is not a soakaway but rather an infiltration shaft. From your description, I understand that the rainwater from your house roof first flows into this shaft, and then, if the volume exceeds the shaft’s capacity, it flows into a soakaway?
2. In my opinion, the supply pipes should be positioned higher to prevent backflow. The pipe leading to the soakaway should be the lowest, so that any water exceeding the shaft’s capacity flows into the soakaway.
But honestly, I’m not an expert on this, so others should provide the final answer.
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Coletrickle_780819 May 2022 09:26There are three pipes in this shaft. The two smaller ones come from the house. The larger one then leads into the soakaway.
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WilderSueden19 May 2022 09:34So this is simply an access shaft for your drainage system?
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