French drain works by using a gravel-filled trench with a perforated pipe to collect and redirect excess surface and groundwater away from an area, using gravity to move water downhill to an outlet like a storm drain or dry well, preventing soggy yards and foundation issues by channeling water through the stone and into the pipe. A permeable fabric surrounds the pipe and gravel to keep soil and debris out, ensuring the system remains functional. #learnontiktok #frenchdrain #mold #construction #f