Running a rain water drain .

[rockhopper69]

Hi guys
I’m after abit of advice , I’m running a new underground rain water drain ,and at abit of a quandary of which backfill material to use , I’ve got a tonne of gravel that I was going to bed and cover before backfilling with clay and soil, the thing is I’ve also got a load of soft yellow building sand sat doing nothing , would this type of sand be ok as either a bedding for the drain or for backfilling after the gravel , just abit unsure if yellow sand can be used as a bedding / filler ie will it drain ok etc
Thanks in advance

 

[noseall]

Sand could be used once you have a covering of pea gravel over the pipe, yes.
I'd be more inclined to get rid of the clay down there though.

 

[kingandy2nd]

My BC said the guidance is that media up to 10mm was fine for covering the pipes, so actively encouraged me to use the sand I’d dug out to backfill my pipes.

 

[rockhopper69]

Thanks for the help guys , in the end I bedded the pipe on gravel , then covered over the top . I will fill the rest of the trench in with the soft sand I have . cheers