I'm going to building a retaining wall to level my garden. The wall is not touching the house, I'm trying to work out the drainage solutions for this wall. Its not going to be too dissimilar from the image below.
The lower section (below the DPC) will be double skinned engineering bricks. Above the DPC will be concrete blocks laid flat and then the blocks will be rendered. On the image, they suggest using copper pipe, however, are there any other options for this? I didn't want to use copper pipe as I would prefer something that looks a bit better, such as a standard weep vent, but I can't see any that are deep enough for the two layers of bricks (and bricks will be offset from each other anyway)
What other options are there?