A
French drain or
weeping tile (also
blind drain,
rubble drain,
rock drain,
drain tile,
perimeter drain,
land drain,
French ditch,
sub-surface drain,
sub-soil drain or
agricultural drain) is a
trench filled with
gravel or
rock or containing a perforated pipe that redirects
surface water and
groundwater away from an area. A French drain can have perforated hollow pipes along the bottom (
see images) to quickly vent water that seeps down through the upper gravel or rock.