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
If it is perforated, it won’t be very useful for gas :)
Colour is irrelevant.
Depending on agreed specification, geotextile should encase pipe and gravel to stop soil contaminating them.
Hope this helps. Ta. John.
Yellow perforated pipe is fine. 100mm is suitable, and yes the trench should be lined with terram to stop the fines washing from the sub soil, through the gravel and into the perforated pipe causing it to block up after a period of time. If you have any inspection chambers on the run, make sure they are catch pits.
YELLOW COIL LAND DRAINAGE PIPE 50M X 110MM can be used no problem,
Once the trench is completed, it can be lined with the geo-textile. This MUST be a construction grade geo-textile and not a weak landscape fabric which will tear and fall apart when buried, offering no protection whatsoever to the gravel.
..the additional width allows for the wrap-over on top of the gravel backfill.
I hope this answer is good enough.
Marek -Customscape ltd
They are typically black, yellow would indicate a trunking for gas. Is more than likely they was out of stock or its what he had left, it still will do the job just may cause some confusion for anyone who is excavating the gsrden in the future
I can only say from the discription that perforated pipe is used as part of of drainage house protection systems. Been yellow is a colour related to gas but this isn't. The perforation in the pipe collects ground water and sends it to a land drain so any kind of textile would defeat its purpose. Its always welcomed customers who are unsure to ask the tradesman questions so misunderstanding don't happen.
Make sure pebbles or something similar is covering the pipe before been back filled, v important