Making progress on my drainage system behind the big shed
You drill holes in the 90mm stormwater pipe
Then lay it with the holes downward in a trench dug into the soil. The trench contains a sheet of geofabric that is very water permeable but will hold back dirt. (No Malmo/Stumpy DeWalt equipment required. $36 Chinese drill is the biz!)
Then put some gravel in between the pipe and the fabric to give the water some space to run down to where the holes are
The water then enters the pipe through the holes and flows away instead of building up in muddy puddles behind the shed
Each 6m length has contour to slot together
But if you are joining an odd section you can bodge the connection super bodgy style since the pipe is supposed to be leaky to let the water in
Make sure to put rocks on top of the pipe so it does not try to float when the water pressure builds up on the outside of the pipe or you will be repeating the gravel laying from scratch!