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Drainage pipe spec for backyard

Mikey
last month

Hi folks:

We are changing our backyard to help with drainage. Our contractor needs us to give them the spec, as there are city inspector involved, so they want to spec to be from us and approved by both city inspector. Basically we need to replace 1' of soil with gravel, and install artificial lawns. We are in Seattle area and rains a lot.


We just sketch out the pipe layout in the yard. Have a question regarding drainage pipes. We plan to burry it 6" below grade. We run into city inspector before, and remember that he wanted us to have PVC pipelines. I wonder if they are referring to this type?


https://www.homedepot.com/p/Advanced-Drainage-Systems-4-in-x-10-ft-2-Hole-Triplewall-Pipe-4520010/100191022


Any input is welcome.


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