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So my structural engineer has sized the required soakaway for my house (inc new extension)
22m long, 0.6m wide, 1.5m deep (starting from 1m down). 20m3 in total
I'd like to dig and fill the soakaway myself as I have an old digger
The soakaway is to take water from 300m2 of roof, as the current surface water soakaway has failed, it is going to be bypassed.
My intention is to dig out the existing 110mm drainage that runs to the existing soakaway and extend that to my all encompassing soakaway.
It will be a long skinny trench soakaway. hole dug, terram installed, then 40-60mm granular filled. The inflow would be at one end of the soakaway as its on a natural slope.
The engineer had asked for 110mm twinwall fully perforated pipe to run the length of the trench
but that's all the detail I have.
I've scratched around the internet and found mixed info, but bre365 seems to suggest that installing an inspection shaft either end of the trench, with a horizontal distribution pipe is the way to go, sketches I have seen show a 225mm inspection shaft all the way to the base of the soakaway connected to the 110/150mm twinwall.
I cant figure out how I could connect up the 110mm drainage pipe to the 225mm inspection shaft and that to the 110mm twinwall.
I've drawn a picture of what I'm thinking and a picture from bre365 digest.
anyone got any advice?
22m long, 0.6m wide, 1.5m deep (starting from 1m down). 20m3 in total
I'd like to dig and fill the soakaway myself as I have an old digger
The soakaway is to take water from 300m2 of roof, as the current surface water soakaway has failed, it is going to be bypassed.
My intention is to dig out the existing 110mm drainage that runs to the existing soakaway and extend that to my all encompassing soakaway.
It will be a long skinny trench soakaway. hole dug, terram installed, then 40-60mm granular filled. The inflow would be at one end of the soakaway as its on a natural slope.
The engineer had asked for 110mm twinwall fully perforated pipe to run the length of the trench
but that's all the detail I have.
I've scratched around the internet and found mixed info, but bre365 seems to suggest that installing an inspection shaft either end of the trench, with a horizontal distribution pipe is the way to go, sketches I have seen show a 225mm inspection shaft all the way to the base of the soakaway connected to the 110/150mm twinwall.
I cant figure out how I could connect up the 110mm drainage pipe to the 225mm inspection shaft and that to the 110mm twinwall.
I've drawn a picture of what I'm thinking and a picture from bre365 digest.
anyone got any advice?