French drain top layer Hi, I'm installing a short French drain (about 10 feet) in my sloped backyard, which drains toward a seawall. The pipe will run in front of a firepit area and will partially be under sod and landscape rocks. The pipe is a solid perforated 3" pvc pipe (couldn’t do 4" due to seawall anchoring rods which limit the trench depth to 8") In spots where the drain isn’t under turf, should I just use rocks on top, or add soil and then rocks? Should I do a full buritto wrap even under the rocks? Originally by u/magnumpl on Reddit: https://tinyurl.com/2cbxr3xq