I posted this on garden forum and should have posted here instead.
We have round Osma drain gully 150mm wide going to 160mm underground pipe.It has square grill on top.
We have raised the concrete level by 10cm and need some sort of extension but are unable to find one .I looked on Osma wesite but cannot see any that would be suitable.
160mm pipe wont obviously fit it needs to have smaller pipe .Any ideas?
We have round Osma drain gully 150mm wide going to 160mm underground pipe.It has square grill on top.
We have raised the concrete level by 10cm and need some sort of extension but are unable to find one .I looked on Osma wesite but cannot see any that would be suitable.
160mm pipe wont obviously fit it needs to have smaller pipe .Any ideas?
