silt screen to prevent fine particu- late matter from gunking up the pipe sock. I then covered the silt screen with more drainage rock. I left the open “daylight” end of the drainpipe uncovered tem- porarily so I could observe its performance during the next rain- storm. I did, however, block it off with some heavy fist-sized rocks, to keep critters out of the pipe and to ensure easy passage of water without worry of particulate matter clogging the exit. Once the trench was completely filled, I tamped the surface level and topped it with the old con- crete pavers to retain a perme- able surface. Some drains use an inlet grate at the point where the water pools the most. My idea was to omit the usual crushed rock and sand bed from beneath the pavers and essentially let the entire walkway serve as an inlet grate. Doing this makes is difficult to install the pavers completely level, but I was more concerned with the functionality of the drain.
Compact the drainage gravel every 4” of added depth. The drain trench was recessed into a broader trench I dug for the paver walkway, which I filled with gravel, compacted and leveled.