Backfill with Drainage Stone

What happens here

After the drain pipe is installed, backfill the area around and above it with clean drainage stone. This typically involves using angular gravel that allows water to pass through easily while providing support for the blocks. Continue to fill this area with drainage stone, ensuring it surrounds the drain pipe completely and extends upward to the level where the next course of blocks will be laid. This stone layer prevents native soil from infiltrating the drain pipe and contributes to overall wall stability.

Goal: Provide permeable backfill around the drain pipe and behind the first course.