On 20 Aug, 05:37, Matty F wrote:
A ditch under the house (not mine) gets a small amount of water in it
every time it rains. I want to put a 40mm plastic drain pipe in the
ditch to drain the water. The ditch slopes slightly downhill, and into
the basement where the water collects.
I want to stop the water going past the end of the pipe, and to stop
earth getting into the pipe.
Any ideas? Perhaps I could poke the pipe through a hole in some kind
of membrane.

This might sound pedantic but having suffered through the devastation
of the 2007 floods and the ensuing investigations as to why our
village suffered so badly it emerged that a few thoughtless
individuals had unlawfully piped various dykes. Such activity is
controlled under the 1936 public health act and the 1994 land drainage
acts. Any such works should only be done after the permission of the
local drainage authority has been granted. Note that design figures
for flow may be required although if there is an upstream culvert
nearby the usual simple requirement is for your pipe to be at least as
big as this.
In our case one clown put in two parallel 12" pipes despite there
being a 36" pipe council culvert upstream. Go do the maths!
Note also this also applies to private dykes running across private
land.