On a new build estate getting a land drain installed in the garden. I'm concerned that the builder is using perforated yellow ducting (which indicates gas pipe) for the drainage. Is there any standards to state which pipe should be used? Also there is a lack of geotextile around the piping, should this also be used?
Trying to make sure I'm not been done over
Land drain should be like a French drain black peferated plastic pipe clean stone as well then wrap the pipe make sure you use terham 1 layer of clean stone 2 terham 3 lay pipe inside terham 4 stone over pipe till 200m from top 5 fold over terham 6 stone over top that the rite way